Collins Cobuild

adverb phrase
two adverbs used together; eg She spoke very  quietly…
He did not play well enough to win.
See Unit
38
affirmative
a clause or sentence in the affirmative is one which does not
contain a negative word such as ‘not’ and which is not a question.
See Units
21
,
29
–
30
,
41
–
42
apostrophe
s
an ending (‘s) added to a noun to indicate possession; eg
…Harriet’s daughter… the professor’s husband… the Managing Director’s
secretary.
See Units
21
–
22
article
See
definite article, indefinite article
.
auxiliary
another name for
auxiliary verb
.
auxiliary
verb
one of the verbs ‘be’, ‘have’, and ‘do’ when they are used
with  a  main  verb  to  form  tenses,  negatives,  and  questions.  Some
grammars include modals in the group of auxiliary verbs.
See Units
3
,
5
,
7
,
9
–
11
,
57
base
form
the form of a verb without any endings added to it, which is
used in the ‘to’–infinitive and for the imperative; eg walk, go, have, be.
The base form is the form you look up in a dictionary.
See Units
3
,
72
,
79