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3. 這是非限制性定語從句嗎

If a book is in English, ______ may mean slow progress for you.

A. that                     B. which                   C. as                        D. and it

此題應(yīng)選 A。容易誤選 B。許多考生一看到空格前的逗號, 就想當(dāng)然地認(rèn)為這是非限制性定語從句, 從而誤選了B。

考生可以想一想, 假若此題選B(which), which 用以引導(dǎo)一個非限制性定語從句, 而其前又是一個以if 引導(dǎo)的條件狀語從句, 那么請問：此句的主句在哪里?

通過以上分析我們可以知道, 既然本句前面有一個條件狀語從句, 那么后面一句就應(yīng)該是主句。本題選that, 即為主句主語, 全句意為：如果一本書是用英語寫的, 那么那就意味著你要讀得慢些。

注意：當(dāng)從句位于主句之前時, 千萬不要在主句前誤加并列連詞或誤認(rèn)為是某種從句。請做以下單選題：

1. When he was tired, ____ he had a rest.

A. and                      B. but                       C. so                        D. ×

2. Because he got up too late, ____ he missed the train.

A. so                        B. but                       C. and                      D. ×

3. Though he is poor, ____ he is happy.

A. and                      B. so                        C. but                       D. ×

5. As is known to us all, ____ China was liberated in 1949.

A. and                      B. but                       C. which                   D. ×

答案：1. D 2. D 3. D 4. D 5. D

4. 這個情態(tài)動詞后要接動詞原形嗎

He tried his best and did what he could ______ us.

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

此題應(yīng)選B。容易誤選A。簡單地認(rèn)為：在情態(tài)動詞后永遠(yuǎn)要用動詞原形。

其實這是一個省略句, 若把句子補完整應(yīng)為：

He tried his best and did what he could do tohelp us. 他竭盡全力, 做了他所能做的一切來幫助我們。

從上句可以看出：句中的不定式(to help us)是用作目的狀語的, 而不是與情態(tài)動詞(could)一起構(gòu)成謂語。

請比較以下幾句：

1. He ran as fast as he could ____ the early bus.

A. to catch                B. catch                    C. catching               D. caught

2. He ran as fast as he could _____ to catch theearly bus.

A. to hope                 B. hope                     C. hoping                  D. hoped

3. He spent every minute he could _____ spoken

English.

A. practise                B. to practise

C. practising              D. practised

第1題應(yīng)選 A。其中的不定式短語 to catch the earlybus 用作目的狀語。

第2題應(yīng)選 C。其中的現(xiàn)在分詞短語 hoping to catchthe early bus 用作伴隨狀語。

第3題應(yīng)選 C。其中的動名詞短語 practising spokenEnglish 與 spent 有關(guān)(spend... [in] doing sth. )

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