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常使用完成时的句型
(1)This/It/That is the first/...time＋that sb.has/have done；
This/It/That was the first/...time＋that sb.had done sth.这是某人第几次做某事。
It was the third time(that)he had made the same mistake.那是他第三次犯同样的错误了。
(2)It(This)is/was the＋*＋名词＋(that)定语从句，从句中的谓语用完成时。
(3)It is/has been＋一段时间＋since sb.did；
It was/had been＋一段时间＋since sb.had done sth.自从……以来多久了。
(4)hardly(scarcely)...when.../no sooner...than...( 一……就……)主句用过去完成时，从句用一般过去时。
Hardly/No sooner had I got home when/than the rain poured down.我一到家，就下起了倾盆大雨。