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1、-it用法及句型归纳-第 3 页it用法及句型归纳it为人称代词,主格与宾格同形。该词用法灵活,下面帮助同学们作以归纳。一、可用来代替指示代词this或that。例如:Whats this/that? 这/那是什么?Its a ruler. 这/那是尺子。二、表示时间、距离、天气、数字等。例如:1. Whats the time?几点了?Its ten to ten. 九点五十。2. Whats one plus two? 一加二等于几?Its three. 等于三。三、用来代替前面提到的人或物。例如:This is my pen. Give it to me, please. 这是我的钢笔,
2、请把它给我。四、指心目中或上下文中所指的人或物。例如:1. Whos that over there? 那边的人是谁?Is it Bill? 是比尔吗?2. Miss Gao has a computer. Its new. 高老师有一台电脑,它是新的。五、指身份不明、性别不详的人或者指照片中的人。例如:Whats the baby in the picture?照片中的那个婴儿是谁?Its me. 是我。六、在电话用语中,可用it来指代对方或者自己。例如:Hello! Whos it? 喂,你是哪位?Its Jim. 我是吉姆。在初中英语教材中,出现了许多由it引导的固定句式,现归纳如下:
3、一、Its time for sb. to do sth. / Its time for sth.意为是(某人)该干的时间了、到的时候了。例如: 1. Its time for supper to have supper.该吃晚饭了。 2. Its time for me to study.我该学习了。 二、It takes(sb.)some time to do sth.意为(某人)花时间做某事。例如: 1. It takes twenty minutes to go to school by bike. 骑自行车上学要花二十分钟的时间。 2. It took me a week to fi
4、nish reading the book. 我花了一周时间读完这本书。 三、It is ones turn to do sth.意为轮到某人做某事了。例如: Its your turn to be on duty tomorrow. 明天轮到你值日了。 四、It is has been 时间段since 一般过去时,意为自从以来已过了(时间)。 例如: 1. It is / has been four days since I caught a cold. 我感冒已四天了。 2. It is / has been two weeks since we met last. 自从我们上次见面以来
5、已过了两周。 五、It seems seemed that从句,意为看起来好像。例如: It seemed that our team was going to win. 我们队看起来好像要赢了。 六、Its表语to do sth.。例如: Its a good idea to go out for a walk. 出去散步是个好主意。 七、Its adj.that从句。例如: Its true that I may fall behind the other students.我真可能落在别的学生后面。 八、 Itsadj.of(for)sb.to do sth.。对于这个句型究竟用of还是
6、用for,主要取决于前面的形容词。如果形容词是描述不定式行为者的性格、品质等的,如 kind,good,nice,clever等用of;如果形容词仅仅是描述行为的则用for,这类形容词常见的有difficult,easy,hard, important,dangerous等。例如: 1. It is nice of you to come to see me.你能来看我真好。 2. It is dangerous for children to play with fire.对小孩儿来说玩火是危险的。 九、 It is + V-ed分词 + that 从句 It is said that 据说 It is thought that 人们认为 It is believed that 人们相信 It is known that 众所周知