(1) It is ／was ＋被强调部分＋that（who）．．．

例：It was I who wrote to my uncle yesterday．是我昨天给我叔叔写信的。

(2) Is/was it + 被强调部分 + that (who) ...

例：Was it your brother that you met in the street? 在街上你遇见的是你兄弟吗？

(3) Where/who/what/how等特殊疑问词 + is/was it that ...

例：How is it that you will go to visit her tomorrow? 明天你究竟怎样去看望她？

(4) do +谓语动词（强调谓语）

例：They do know the place well. 他们的确很熟悉那个地方。