Her job is to take care of the children and (to) wash clothes.

　　Its better to laugh than to cry.

　　3、特殊结构中的省略

　　would rather, had better, would sooner, do nothing but, have nothing to do but, there is nothing to do but, cant help but, rather than等后不定式符号常省略。

　　例如：He would sooner die than surrender.

　　Id rather look after the baby than wash dishes.

　　三、状语从句的省略：若从句的主语和主句的主语一致，且从句的谓语动词中含有be动词，从句的主语连同be动词一起省略。

　　He wont go to the party unless (he is) invited.

　　Country music today remains much the same as (it was) before.

　　When (I am) in trouble I always turn to her for help.

　　Look out for cars when (you are) crossing the street.

　　【注意】as引导让步状语从句时，通常从句要倒装。若从句的表语是可数名词单数，将名词提前时，名词前面的冠词（a, an）须省略。

　　Child as he is, he knows much about the society.

　　Though he is a child, he knows much about the society.

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