chapter 1: auxiliaries
Auxiliary verbs do not have most of the characteristics of true verbs. Instead, as part of the Main Verb Phrase Formula, auxiliary verbs work with a main verb to enhance and supplement grammatical meaning. We will discuss the Main Verb Phrase Formula in more detail in Chapter 2. The important thing to remember is that if a verb is functioning as an auxiliary, it is not the main verb of a clause.
Auxiliary Verb Forms
Auxiliaries are structure-class words, so should not be confused with form-class words. Auxiliary Verbs combine with present and past participles to create the Perfect, Progressive (Continuous), and Perfect Progressive Aspect MVPs. These aspects provide additional information about the duration, completion, or repetition of an action.
Perfect Aspect: The perfect aspect in English is used to describe completed actions or states. It is formed by combining a form of the auxiliary verb “have” with the past participle of the main verb. The perfect tense allows speakers to express the relationship between two time periods, emphasizing the completion or result of an action rather than the action itself.
- Present perfect: “I have lived in Seattle for 10 years.”
- Past perfect: “He had finished his homework before dinner.”
Progressive (Continuous) Aspect: The progressive aspect, also known as the continuous aspect, expresses ongoing or incomplete actions. It is formed by combining a form of the auxiliary verb “to be” with the present participle (-Ing form) of the main verb.
- Present progressive: I am writing.
- Past progressive: She was singing.
Perfect Progressive Aspect
The perfect progressive aspect (also called the perfect continuous aspect) combines elements of the perfect and progressive aspects. It is used to describe actions that were ongoing for a period of time but are now complete or actions that continue to a specific point in time. The Perfect Progressive Aspect is formed by a form of the auxiliary verb have (had, have, or will have) in the first position. The word “been” is in the second position, and the present participle of the main verb (ending in -ing) is in the third position.
- Present Perfect Progressive: “I have been studying for three hours.”
- Past Perfect Progressive: “She had been working at the company for five years before she left.”
Modal Auxiliaries
Modal Auxiliary Verbs are a subset of auxiliary verbs that express modality, such as possibility, ability, necessity, and permission. They are used alongside the main verb to modify its meaning and provide additional context. Modal auxiliaries are by adding the Modal Auxiliary to the Base Infinitive of the Main Verb.
- “I can swim.” or “She may arrive soon.”
- “They should have called.” or “We could have won.”
Remember, if a modal auxiliary is in the first position, the Main Verb Phrase (MVP) is identified as in the present tense.
The nine modals always precede the main verb as well as any other auxiliaries in the Main Verb Phrase. Modals include
● can
● could
● will
● would
● shall
● should
● may
● might
● must
Modal auxiliaries do not have many of the characteristics of true verbs. They cannot take tense inflectional morphemes; therefore, all modal auxiliaries in this textbook should be identified as present tense only. Other verb characteristics that modal auxiliaries do not meet are that they cannot be made into commands or negatives.
-
A bright green bird has nested there.
-
The judges have voted.
-
A bright green bird had nested there.
-
The judges had voted.
- I have chicken pox.
-
She has all the latest gadgets.
-
I had my favorite meal for my birthday.
-
The Smiths had a baby.
-
Harvey is cooking squash.
-
Harvey was cooking squash.
-
The National Anthem is sung by the whole crowd.
-
The National Anthem was sung by the whole crowd.
-
Keoni is a student.
-
The lawyers were all in court.
-
He leaves tomorrow.
-
Does he leave tomorrow?
-
He wants curry for dinner.
-
He doesn’t want curry for dinner.
-
This tastes delicious.
-
This does taste delicious!
-
We want chicken curry more than they want chicken curry.
-
We want chicken curry more than they do.
-
Shawna did her own make-up.
-
That meal did me a world of good.
-
You will do as you’re told.
TRY THESE SIMPLE PRACTICE EXERCISES

