高中英语it的用法课件（共35张PPT）

it可用来指代前文提到的人,物或事情,也可以用来指时间,金钱,距离,天气等自然现象 基本用法: 1. S+ think + it + necessary +( for sb. ) to do sth. The chairman thought ___ necessary to invite Professor Smith to speak at the meeting. A. that B. it C. this D. him Sentence patterns: B … find … possible feel … important … /clause 形式宾语 2. S+ V + it + one’s duty + ( for sb. ) to do sth. /clause 3. S + V + it + no good + doing sth. no use 形式宾语 I think it his duty to clean the blackboard. Sentence patterns: … a rule an honour … … … find possible S+ think + it + necessary +( for sb. ) to do sth. /clause feel important … … Sentence patte