【练习】

1. I am sorry ______ written you a letter at the time.

A. to have not    B. to not have    C. not to have     D. not having

答案:  C

解析:  不定式的完成式的否定式做原因状语,否定词not必须在不定式之前。

2. She had no money______ a birthday present for her children.

A.to buy with   B.buying   C.bought   D.with which to buy

答案: D

解析: 介词+关系代词+不定式的结构可以在句中用作定语,其作用相当于一个定语从句。9.B。本题考查非谓语动词作定语。不定式作定语时,表示将来的动作;现在分词作定语,表示主动、进行;过去分词作定语,表示被动、完成。因为dates是被标在gold coin上,所以用过去分词表示被动。

3. Tom apologized to me ______ again.

A. to be late     B. of being late

C. to have been late      D. for beinglate

答案: D

解析: apologize to sb. for sth./doing sth.为常见搭配.

4. ______ all my letters, I had a drink and went out.

A.Finished   B.Having finished   C.Finishing   D.To finish

答案: B

解析: 因finish这一动作发生在I had a drink and went out之前,所以必须用现在分词的完成式。

5. From the dates______ on the gold coin, it is conformed that it was made five hundred years ago.

A.marking   B.marked   C.to be marked   D.having been marked

答案: A

解析: 不定式作目的状语。

6.The policeman came up to the lonely house with the door ____(open), ____(stand) there for a while and then entered it.(填空练习)

答案:open; stood

解析: with the door open是with 的复合结构,open 为形容词,表状态; stood与came,entered为并列关系,在句中作谓语。

【小知识】动词不定式可以作下列的状语

①目的状语: Every morning he gets up very early to read English.

为了强调不定式表示目的的作用,可在不定式前加in order to或so as to(以便或为了),但应注意in order to位于句首或句中均可,而so as to不能位于句首,如:She reads China Daily every day in order to (so as to) improve her English.

将表示目的的不定式置于句首,也可强调目的的作用,如:To master a foreign language, one must work hard at it.

②结果状语:They lived to see the liberation of their home town.他们活到亲眼见到了他们家乡的解放。

③too + 形容词或副词 + 动词不定式,表示“足能”的结果,如:You are old enough to take care of yourself now.