一、在英语写作可能使用到的重要句型
1）以形式主语it引导的有关句型:
（1）“It is / was＋被强调的部分＋that(who)+剩余的部分.”例如：
①It wasn’t until he came back that I went to bed.“直到他回来我才睡觉”(一定要注意被强调句型谓语动词否定的转移及形式)。
②It was because he was ill that he didn’t come to school today.“只因为他有病了今天没有来上学”（只能用because而不能用for, as 或since）
③It is I who am a student. “我确实是个学生”。
