问题补充:
we don know how to do that.We don know what makes us laughhow 后边为什么加 to 而what后不加呢
答案:
how to do that是不定式短语做宾语,也可以用how we can do that,是宾语从句.而what makes us laugh是宾语从句,且what 在从句中做主语,所以what 后面不加to.
时间:2022-06-26 17:38:48
we don know how to do that.We don know what makes us laughhow 后边为什么加 to 而what后不加呢
how to do that是不定式短语做宾语,也可以用how we can do that,是宾语从句.而what makes us laugh是宾语从句,且what 在从句中做主语,所以what 后面不加to.