It has been six years since he married Mary. 他和玛丽结婚已经六年了。 23It is +adj./n. + for sb. to do sth. 做某事对某人来说…… It是形式主语,真正的主语是不定式to do sth。...
②在介词之后:It depends on whether it is going to rain. 3.在不定式之前:We haven’t decided whether to go there. 3. 如果宾语从句原来是特殊疑问句,只需用原来的疑问词引导。 1...
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