“助动词”造句

在英语中,将来时常用助动词来表现.
In English the future tense is often rendered by means of auxiliaries.

就像在句子4.2a一样, 它在这儿做助动词.
It'serves here as an auxiliary verb, as in sentence 4.2 a.

助动词可为否定形式,但要用缩写 -n 't表示.
Helping verbs may be negative contractions with - n't.

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