“ It is……”句式归纳之二
>1. 强调句中的主语时，谓语动词要与被强调的主语保持人称和数的一致。例如：
It is I who / that am to blame for it.
2. 可以强调 because 引导的原因状语从句，但不能强调 as ， since 引导的原因状语从句。例如：
It was because her mother was ill that she missed the important lecture that day.
是因为她母亲病了，那天她才没能听到那个重要的演讲。
3. 强调时间状语、地点状语时要用 that 而不能用 when 或 where .例如：
It was last spring that we planted these fruit trees.
我们是在去年春天栽的这些果树。
It was in a faraway mountain village that he learned a lot from the peasants.
他是在一个遥远的山村里向农民学到许多东西的。
4. 强调 not until 引导的时间状语时， that 后面分句中的主语、谓语不用倒装。试比较下面两例：
（ 1 ） It is not until she took off her glass that I recognized she was a famous film star.
直到她摘下眼镜我才认出她是位著名影星。（强调句）
（ 2 ） Not until she took off her glass did I recognize she was a famous film star.
直到她摘下眼镜我才认出她是位著名影星。（倒装句）
《高中英语语法-“ It is……”句式归纳之二》由留学liuxue86.com编辑整理