and连接的句子
在由and连接的句子中，为避免重复常省略一些重复的词或词组。
⒈ 省略共同的主语或宾语。
如：Mr. Smith picked up a coin in the road and (Mr.Smith)handed it to a policeman.
⒉ 若主语不同而谓语助动词，情态动词相同，则省略后面的助动词或情态动词。
如：Jack must have been playing football and Mary (must have been)doing her homework.
⒊ 若主语与谓语动词相同，则省略后面的主谓成分。
如：His advice made me happy, but (his advice made) Jim angry.
⒋ 若主语不同，但主要动词及后续部分相同，则省略主要动词及后续部分。
如：I was born in winter in 1988 and Bob ( was born in winter) in 1989.
⒌ 省略重复的介词，连词及后续部分。
如：He was late because he had overslept and ( because he had) missed the train.
