九年级下册Module 1 Travel Unit 1 We toured the city by bus and by taxi语言点课件(共21张PPT)

有人称、时态和数的变化

must

主观认为必须

没有人称、时态和数的变化

Her mother is out so she has to look after her little sister. You don’t have to do much to make someone happy. (=mustn’t ) We must follow the school rules. ---Must I clean my room now ---No, you don’t have to. (= ) =No, you needn’t. ---Yes, you must. 3. because of because of

短语介词

接名词、代词、或动名词

作宾语

because

连词

接句子

引导原因状语

转载请注明出处！本文地址：https://www.docer.com/preview/23280787