Unit 13 We are trying to save the earth.,Self Check,单击页面即可演示,I was waiting for the school bus but it didnt come. Then I _ it was Saturday. I woke up late this morning. I had to really _ to get to school on time. Theres a good TV show tonight but its at 1:00 am. I dont want to _ that late. Sally _ me to her birthday party. Its at her house on Saturday. Do you know where John is? He was going to meet me earlier but he didnt _.,Exercise,rush realize invite show up stay up,rush,realize,stay up,invites,show up,1,Lets meet a friend, Luo Ming.,She overslept (slept a long time).,She was riding fast.,It was Sunday.,When she got to school, she realized nobody had been in school.,Look at the pictures and write about Luo Mings day.,2,In each line, circle the word that doesnt belong.,dentist homework relative fool embarrassed exhausted happy lock costume break down show up oversleep farmer go off stay up realize,3,Lets use them to make sentences.,dentist homework relative fool embarrassed exhausted happy lock costume break down show up oversleep farmer go off stay up realize,For example: When the dentist arrived, he realized the relative had fooled him.,Grammar Focus,2. 过去完成时可以表示过去某一时刻或某一动作之前完成的动作或呈现的状态。也就是说发生在“过去的过去”。,1. Past perfect Tense 过去完成时 构成：had过去分词,过去完成时态的用法：,1.表示过去的过去，通常由when或by引导的短语或者从句做时间状语或时间状语从句 By the end of last year, I had learned about one thousand English words. By the time he was twenty, he had won about ten medals. When I got there, they had already left.,2.常用在宾语从句中 He told me he had already finished his homework. I realized he had fooled me again. 3.体现在上下文中 I didnt go to the movies yesterday because I had seen it twice.,Thank you !,