内容正文:
could+V.
Read and discuss
Could you teach me a little bit about it?
could +V.
I can’t live without it.
can’t +V.
Should I go there?
should +V.
情态动词只能和其他动词原形一起构成谓语。
情态动词
1.定义
情态动词是一种本身有一定的词义,表示说话人的情绪、态度或与语气的动词,表示“可以”,
“可能”,“需要”,“必须”,“应当” 等意思。但没有人称和数的变化,不能单独作谓语,只能和其他动词原形构成谓语。
2.用法
(1)can (否定形式:can not/can’t) 表示“能够”“可以”或“能否”。
could(can的过去式) 表示“能够”“可以”或委婉地提出请求或看法。
I can see with my eyes.
It can’t be our teacher. He is on a visit to Beijing. Could you do me a favor?
2.用法
(2) may 表示“可能”“或许”或“可否”“可以”。
might(may的过去式) 表示“可能”“或许”或委婉地表示“可否”“可以”。
May I use your pen? He might go home.
2.用法
must(否定形式must not/mustn’t) 表示“必须”“一定要”
You must come here earlier on Friday morning. The students mustn’t smoke.
should 表示“应当”“应该”。
We should protect the environment.
Read and underline.
Assignment
Can you give me a few minutes?
Sorry, I can’t. I’m running out of time now.
I want to be a good mechanic in the future.
Then you should be a good learner first.
阅读以下短对话,标出其中的情态动词和实义动词。
用适当的情态动词和所给动词补全以下对话。
Read and complete.
1) —
(help) me?
2)— What
(do) to protect our environment?
Could
you help
— Weshould must reduce (reduce) CO2 and plant more trees.
I can’t work (not work) it out by myself.
— Yes, of course.
should we do
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