have done nothing but do 、done 、doing、to do?

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have done nothing but do 、done 、doing、to do?

have done nothing but do 、done 、doing、to do?
have done nothing but do 、done 、doing、to do?

have done nothing but do 、done 、doing、to do?
to do.
有几个固定搭配:have nothing to do but do、can do nothing but do、have no chance but to do.你能发现规律么?规律就是:如果but前面有do ,but后面就要用do;but前面没有do,后面就要用to do ,还要记住一点,就是but 前面的do 一定要是原形,像什么done ,did后面都只能用to do.明白了吗?