這個to是介詞還是不定式符號

【題目】

We are looking forward to ________ from Mary.

A. hear                        B. hearing                        C. heard                        D. have heard

【分析】

此題應(yīng)選B。容易誤選A，認(rèn)為其前的to是不定式符號。

to有時是不定式符號，有時是介詞。用作介詞時，注意以下常見搭配：

look forward to 盼望

devote……to 致力于，獻身于

pay attention to 注意 stick to 堅持

be used to 習(xí)慣于(但used to表示過去經(jīng)常，to為不定式符號；be used to 表示“被用來……”時，to 也是不定式符號)

on the way to 即將成為 (但表示“在做某事的路上”時to是不定式符號)

【類似】

1. He was devoted to _________ the poor.

A. help                         B. helping                     C. helped                      D. being helped

2. The weather was cold，but soon he got used to

_________ there.

A. live                          B. living                        C. lived                         D. having lived

3. You should pay more attention to __________ with

those who differ with you.

A. unite and work          B. uniting and working    C. unite and working     D. uniting and work

4. She was on her way to __________ her daughter.

A. see                           B. seeing                        C. saw                        D. have seen

5. He was on the way to __________ an engineer.

A. become                    B. becoming                    C. became                   D. be

答案：1. B 2. B 3. B 4. A 5. B