4. to read → reading, enjoy其后只可加动名词。

3. say → said， said是过去分词作补足语， 而it是形式主语。

2. speak → to speak， 感观动词/使役动词改为被动语态时， 要将主动态时省去的“to”还原。

1. was used to → used to， used to +动词原形表示过去的习惯， be used to+名词/动名词表示习惯的持续。

10. The doctor advised me giving up to smoke.

　　 注 释

9. You had better not to go there.

8. Smiling graciously, my offer was accepted by him.

7. You should avoid to keep company with such people.

6. It is difficult to make yourself understand in English.

5. His father would not let him to go.