八年级上英语5.8单元知识点

新目标英语八年级上册第五单元语法重点：情态动词的疑问句：是指以情态动词开头的疑问句,它没有人称和数的变化。例如：can you come to my party?Yes,I can/No,I can't。Should he drink some water?Yes,he should/No,he shouldn't。回答此类疑问句时,肯定用yes+该情态动词的肯定式,否定用No+该情态动词的否定式,中间以逗号隔开。附：各情态动词的肯定与否定式：can/can't,could/couldn't,may/mayn't,might/mightn't,should/shouldn't,ought/oughtn't,had better/had better not。第八单元语法重点：一般过去时助动词开头的疑问句：是指以did,was,were等过去时助动词开头的句子,当回答以did开头的疑问句时,没有人称和数的变化,而当回答was,were开头的疑问句时,有人称和数的变化。例如：Did you go to the park?Yes,I did/No I didn't。Did she go to the park?Yes,she did/No,she didn't。Were you sleeping?Yes,I was/No,I wasn't。Was he watching TV?Yes,he was/No,he wasn't。Were they having a picnic on the grass?Yes,they were。/No,they weren't。回答此类疑问句时,肯定用yes+适合该人称的助动词,否定用No+适合该人称助动词的否定式。中间以逗号隔开。注意：当用was或were开头的句子来提问时,其后要用动名词doing。附：各过去时助动词的肯定与否定式：did/didn't,was/wasn't,were/weren't。