老师：hello， everyone welcome to this lesson im miss Chen from nanjing jin 林Hui， wenmiddle school in this lesson we will have a revision of model verbs， non prodictates and verbal phrases now lets start first lets learn something about model verbs。
学生：情态动词本身有一定的词义，但不能独立作谓语，只能和动词原形一起构成谓语。情态动词没有人声和素的变化，否定形式在后面加。Not.
老师：Now we can use can or could to talk about ability milly can speak good English that means milly is able to speak good English Simon could ride a bike when he was seven.
学生：We used could.
老师：To talk about the ability in the past men cant live without water， men cannot live without water， we can use can code or may to ask for permission could sounds more polite than can， may is formal， for example could i smoke here sorry IM afraid you cant.
学生：用 could 来提出请求的时候，表示语气更加委婉。 May i use.
老师：Your bike of course. Cause you may, we use may to say that something is possible. Don't play with knife, it may hurt you. The bamboo forests are becoming smaller and the smaller as a result, pandas may not have a place to live or food to eat. Now think it over, according to the time of the verbiel, by the time she was eight. So we talk about Linda's ability in the past. So we use could.
老师：According to the notice, guests at this hotel can use the sports center at no extra cost. We use can here to talk about the possibility.
老师：yes Einstein couldnt read until he was seven。 We use code to talk about the ability in the past, and the negative form is plus, not after. Could. I see him drink a cup at times? So maybe he likes coffee. We use may to say that something is possible.
老师：How to ask for permission. Yes. May I keep the book for a week? Sorry, I'm afraid you can't. Next, let's learn something about shoot and had better. We used to shoot and had better. When giving advice and telling people what do we think is the best or right thing to do, the toe of head better is stronger than shoot.
老师：Now let's read these two sentences. You should know a little about DIY. You'd better not be late for school again. The negative form of headbatter is plus, not after it.
老师：To keep children away from danger during the coming summer holiday, parents should give them some safety tips. Yes, we use shoot to to give advice.
老师：We know had better do something, so we choose boy. Next, let's learn something about must, 1st. Must I go now. Yes you must.
学生：No you neednt no you dont have to.
学生：它的肯定结构表示必须，而否定结构可以表示没有必要。
老师：Lucy must have troubles she looks unhappy。
学生：在这种语境下， must 它表示一种主观的猜测，表示想必一定怎么样。
老师：now please do this， didnt you see the Zebra crossing you must slow down sun 好，you。
学生：must 表示必须阴刚。
老师：yes according to the context dont you see the light is still red。
学生：表示红灯还是红的。那你就必须要停下来，你不能过斑马线。表示禁止。
老师：So we should use muscent， mom must
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