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AUXILIARY VERBS
Category 1: be,
have, do
These forms of to
be, to have, and to do are used before the main verb.
Their purpose is to
change time or emphasis.
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Unlike other structure
words, these auxiliary verbs
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1. can have
inflectional endings (-s, -ing, -ed, -en)
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2. can also
function as main verbs.
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Category 2: Modal
auxiliaries
The list below shows
all of the modal auxiliaries:
Present
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can
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may
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will
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shall
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must
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Past
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could
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might
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would
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should
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-------
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Unlike the auxiliaries
be, have, and
do, modal auxiliaries
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1. do not use
inflectional endings (-s, -ed, -ing, -en)
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2. cannot function as
main verbs.
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When a verb
phrase uses both kinds of auxiliary verbs, the modal auxiliary always
precedes the be, have, or do auxiliary.
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