强调句型：
(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