Unit 2 Grammar and usage 2 课件 -2021-2022学年高中英语牛津译林版必修第三册

Review To-infinitives 什么是“不定式”？ 不定式是动词的一种非限定形式,由“to+动词原形” 构成，没有人称和数的变化，在句中不能独立作谓语。 The bridge____________(come) to use this end of year leads to Huayang Lake. 谓语是在句子中自带时态和语态的动词。 All functions of to-infinitives 1. Subjects 1)To see is to believe. 2) To improve your oral english is your present task. 2. Objects 1) They agreed to hand in improved model tomorrow. 2) The charity hopes to help all the people in need. All functions of to-infinitives 3. Attributives 1) We have made environmental policies for business to observe. 2) Ordinary people have a lot of things to cope with everyday. 4. Object complements 1) The government encourages us to protect the environment. 2) Everybody was asked to perfect his or her writing skills. All functions of to-infinitives 5. Predicatives 1) My job today is to take care of my little sister. 2) Their method seemed to be more practical. 6. Adverbials of purpose 1) Then as a class, out all the parts together to make a bookle