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2.3 Verbs: Single Word Verbs And Verb Strings

A verb may be just one word:
The moon's cycle, not the sun's, governs the tides. Therefore, low tide comes at a later time each day.
Often, however, a verb is a string of words made of a main verb with one or more auxiliaries in front of it.
The tide was changing at 10:30 yesterday morning. It should be turning today at about 11:10 A.M. We probably could have waited until noon for our fishing trip.
The main verb identifies the event which the sentence is reporting. The auxiliaries tell more about the time or conditions of the event, and they always come before the main verb. The verb string is the combination of auxiliaries and main verb acting together to play the role of verb in a sentence. In the following exercises, the verbs will be analyzed and marked like this:
single-word verb = SV
main verb = MV
auxiliary = X
Verbs in the simple present or simple past tense consist of just one word.

Verbs that emphasize the continuation of an event include some form of to be as an auxiliary (am, is, are, was, were, being).

Verbs that emphasize the completion of an event include some form of to have as an auxiliary (have, has, had).

Verbs that express a future event include the auxiliary will or shall.

Verbs may include several other auxiliaries to express shadings of time or condition. These additional auxiliaries are: do, does, did, can, could, should, would, may, might, must.

Application 3
The following words may be used as auxiliaries within verb strings:

Forms of to do Forms of to have Forms of to be Modals
(used with base form of the next verb in the string) (used with past participle form of the next verb in the string) (used with present or past participle of the next verb in the string) (used with base form of the next verb in the string)
do, does, did have, has, had am, is, are, was, were can, will, shall, could, would, should
    be, being, been may, might, must

Note the words in the shaded area of the chart may sometimes act as single-word verbs:

I am your brother. You have the same kind of eyes as I do.

The rest of the auxiliaries in the chart work only in verb strings:

Everyone will be happy. They must have been expecting something.

Learn the auxiliaries in the chart. They will help you to find verb strings.

TIP FOR ESL STUDENTS:
Click on the ESL icon at left to visit "Functions of Auxiliary Verbs" for help in choosing which auxiliary to use in different situations. Practice these forms with a teacher or tutor.

Application 4
Many auxiliaries can shrink into shorter forms called contractions.
I'm looking forward to this evening with Arny's boss. After supper we'll watch the game unless she'd prefer to play cards.

Here are some common contractions.

Auxiliary Short form Example of Contraction
am 'm I am = I'm
are 're you are = you're
is or has 's Emma is = Emma's
have 've they have = they've
had or would 'd we would = we'd
will or shall 'll he will = he'll

Note: 1. that the apostrophe (') replaces missing letters, and
    2. that there are no contractions for was and were.

At this time, you might want to review the chart on modal auxiliaries in Part Four.

Application 5

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