The Forms of “To Be”

The Greek sea god, Proteus, was (like the sea) capable of changing form in an instant. In order to get any decent information out of him, you had to grab him and hold on tight while he went through his various forms — lion, wild boar, snake, tree, running stream — it wasn't easy. The verb “To be” is said to be the most protean of the English language, constantly changing form, sometimes without much of a discernible pattern. Considering that we use it so often, it is really too bad that the verb “To be” has to be the most irregular, slippery verb in the language.

Present Tense
I am	We are
You are	You are
He/She/It is	They are

Past Tense
I was	We were
You were	You were
He/She/It was	They were

Perfect Form (past participle) I have been, etc.

Progressive Form (present participle) I am being, etc.

We must choose carefully among these various forms when selecting the proper verb to go with our subject. Singular subjects require singular verbs; plural subjects require plural verbs. That's usually an easy matter. We wouldn't write “The troops was moving to the border.” But some sentences require closer attention. Do we write “The majority of students is (or are) voting against the referendum"? Review carefully the material in our section on Subject-Verb Agreement, and notice how often the choices we make require a familiarity with these forms of the “To be” verb.

Simple Questions

We create simple yes/no questions by inverting the order of subject and the “To be” verb.

• Is your brother taller than you?
• Am I bothering you?
• Were they embarrassed by the comedian?

The same inversion takes place when “To be” is combined with verbs in the progressive:

• Am I working with you today?
• Is it snowing in the mountains?
• Were your children driving home this weekend?

The Linking and Existential 'To Be'

The verb “To be” most frequently works in conjunction with another verb: “He is playing the piano,” “She will be arriving this afternoon.” Occasionally, though, the verb will stand by itself, alone, in a sentence. This is especially true in simple, brief answers to questions.

“Who's going to the movies with me?”
“I am”

“Who's responsible for this mess in the bathroom?”
“She is.”

An auxiliary can be combined with the base form of “To be” to provide simple answers to questions that use forms of “to be.”

“Is Heitor in class this morning?”
“Well, he might be.”

“Is anyone helping Heitor with his homework?”
“I'm not sure. Suzanne could be.”

The verb “To be” also acts as a linking verb, joining the sentence subject with a subject complement or adjective complement. A linking verb provides no action to a sentence: the subject complement re-identifies the subject; the adjective complement modifies it. (For further information and additional vocabulary in dealing with linking verbs, visit the hyperlinks in this paragraph.)

• Professor Moriber is the Director of Online Learning.
• Our trip to Yellowstone was fantastic!

In Passive Constructions

A form of the verb “To be” is combined with a past participle to form the passive. Passive verb constructions are useful when the subject of an action is not as important as what the subject did (the action of the sentence) or when the subject is unknown. For instance, the police might report that “The professor was assaulted in the hallways” because they do not know the perpetrator of this heinous crime. In technical writing, where the process is more important than who is doing the activity, we might report that “Three liters of fluid is filtered through porous glass beads.” Regardless of the verb's purpose, only the auxiliary form of “To be” changes; the participle stays the same. The “To be” will change form to indicate whether the subject is singular or plural:

• The foundation is supported by enormous floating caissons that keep it from sinking into the swamp.
• They were constructed by workers half submerged in the murky waters.

• Wooden caissons were used until fiberglass structures were developed in the 1950s.
• Caissons were also designed to function under water in the construction of bridges.

The “To be” will also change to indicate the time of the action and the aspect of the verb (simple, progressive, perfect).

• Water is pumped out of the caisson to create an underwater work chamber. (simple present)
• Some caissons were moved to other construction sites. (simple past)
• While the water was being pumped out, workers would enter the top of the waterproof chamber. (past progressive)
• Many other uses of caisson construction have been explored. (present perfect)
• Caissons had been used by the ancient Romans. (past perfect)
• Other uses will be found. (future)

The “To be” verb can be combined with other modal forms (along with the past participle of the main verb) to convey other kinds of information. See the section on modals for the various kinds of information conveyed by modals (advisability, predictability, guessing, necessity, possibility, etc.).

• The wall joints may be weakened if the caissons can't be rebuilt.
• Perhaps the caissons should be replaced; I think they ought to be.
• These ancient, sturdy structures might have been rotted by constant exposure to water.

Visit our section on the passive for advice on when to use the passive and when to substitute more active verb forms.
When “To be” verbs are combined with modal forms in this manner, the construction is called a phrasal modal. Here are some more examples:

• Rosario was able to finish her degree by taking online courses.
• She wasn't supposed to graduate until next year.
• She will be allowed to participate in commencement, though.
• She is about to apply to several graduate programs.
• She is going to attend the state university next fall.

Sometimes it is difficult to say whether a “To be” verb is linking a subject to a participle or if the verb and participle are part of a passive construction. In “Certain behaviors are allowed,” is "are” linking “behaviors” to "allowed" (a participle acting as a predicate adjective) or is “are allowed” a passive verb? In the final analysis, it probably doesn't matter, but the distinction leads to some interesting variations. Consider the difference between

• The jurists were welcomed.
  and
  
• The jurists were welcome.

Progressive Forms

Click HERE for a thorough discussion of the progressive verb forms. Progressive forms include a form of “To be” plus a present participle (an -ing ending). Frodesen and Eyring** categorize progressive verbs according to the following functions:

• to describe actions already in progress at the moment "in focus" within the sentence, as in “I was doing my homework when my brother broke into my room, crying.” or “I will be graduating from college about the same time that you enter high school.”
• to describe actions at the moment of focus in contrast to habitual actions, as in “We usually buy the most inexpensive car we can find, but this time we're buying a luxury sedan.”
• to express repeated actions, as in “My grandfather is forever retelling the same story about his adventures in Rangoon.”
• to describe temporary situations in contrast to permanent states, as in “Jeffrey goes to the University of Connecticut, but this summer he is taking courses at the community college.”
• to express uncompleted actions, as in “Harvey and Mark are working on their deck.”

Tag Questions with “To Be”

Click HERE for a description of tag questions, a device by which a statement is turned into a question. When we use “To be” verbs in a tag question, the basic formula follows: the verb is combined with a pronoun and sometimes with not (usually in a contracted form). Positive statements are followed by negative tags; negative statements by positive tags.

• Robert Frost was America's favorite poet, wasn't he?
• He wasn't widely accepted in this country at first, was he?
• You were going to skip this poem, weren't you?
• There were several typographical errors in this anthology, weren't there? (Be careful here. It's not “weren't they.”)
• I am not a very good reader, am I?
• I'm a better reader than you, aren't I?

Order with Adverbs

Notice that adverbs of frequency normally appear after forms of the verb “To be”:

• As a student, he was seldom happy.
• Arturo is always first in line.
• They were never on time.

• My brother-in-law still works for the bank.
• He is still a teller after twenty years.

• This medicine has to be carefully administered.
• She turned out to be secretly married to her childhood sweetheart.

Unnecessary Uses of “To Be”

Even a casual review of your writing can reveal uses of the verb “To be” that are unnecessary and that can be removed to good effect. In a way, the “To be” verb doesn't do much for you — it just sits there — and text that is too heavily sprinkled with “To be” verbs can feel sodden, static. This is especially true of “To be” verbs tucked into dependent clauses (particularly dependent clauses using a passive construction) and expletive constructions (“There is,” “There were,” “it is,” etc.). Note that the relative pronoun frequently disappears as well when we revise these sentences.

• He wanted a medication that was prescribed by a physician.
• She recognized the officer who was chasing the crook.
• Anyone who is willing to work hard will succeed in this program.
• It was Alberto who told the principal about the students' prank. (Notice that the “it was” brought special emphasis to “Alberto,” an emphasis that is somewhat lost by this change.)
• A customer who is pleased is sure to return. A pleased customer is sure to return. (When we eliminate the “To be” and the relative pronoun, we will also have to reposition the predicate adjective to a pre-noun position.)

An expletive construction, along with its attendant “To be” verb, can often be eliminated to good effect. Simply omit the construction, find the real subject of the sentence, and allow it to do some real work with a real verb.

• There were some excellent results to this experiment in social work. (Change to . . . .) This experiment in social work resulted in . . . .
• There is one explanation for this story's ending in Faulkner's diary. (Change to . . . .) Faulkner's diary gives us one explanation for this story's ending.

• There were four underlying causes of World War I. First, . . . .

Fuzzy Verb Phrases with "Be"

Verb phrases containing "be" verbs are often merely roundabout ways of saying something better said with a simple verb. Thus "be supportive of" for "support" is verbose.
The following circumlocutory uses of "be" verbs are common in stuffy writing. The simple verb (in parentheses) is usually better:
Many such wordy constructions are more naturally phrased in the present-tense singular: "is able to" ("can"), "is authorized to" ("may"), "is binding upon" ("binds"), "is empowered to" ("may"), "is unable to" ("cannot").