英语. 用must,must't回答 You ( ) draw on the blackboard. You ( ) return the books in time.You ( ) step on the grass.You ( ) put the books back after you have read them.You ( ) talk to the driver when the school bus is moving.You ( ) clean the
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![英语. 用must,must't回答 You ( ) draw on the blackboard. You ( ) return the books in time.You ( ) step on the grass.You ( ) put the books back after you have read them.You ( ) talk to the driver when the school bus is moving.You ( ) clean the](/uploads/image/z/9697788-36-8.jpg?t=%E8%8B%B1%E8%AF%AD.+%E7%94%A8must%2Cmust%27t%E5%9B%9E%E7%AD%94+You+%28+%29+draw+on+the+blackboard.+You+%28+%29+return+the+books+in+time.You+%28++%29+step+on+the+grass.You+%28++%29+put+the+books+back+after+you+have+read+them.You+%28++%29+talk+to+the+driver+when+the+school+bus+is+moving.You+%28++%29+clean+the)
英语. 用must,must't回答 You ( ) draw on the blackboard. You ( ) return the books in time.You ( ) step on the grass.You ( ) put the books back after you have read them.You ( ) talk to the driver when the school bus is moving.You ( ) clean the
英语. 用must,must't回答 You ( ) draw on the blackboard. You ( ) return the books in time.
You ( ) step on the grass.
You ( ) put the books back after you have read them.
You ( ) talk to the driver when the school bus is moving.
You ( ) clean the classroom every day.
You ( ) wait in line for the school bus.
You ( ) talk too loudly in the reading room.
英语. 用must,must't回答 You ( ) draw on the blackboard. You ( ) return the books in time.You ( ) step on the grass.You ( ) put the books back after you have read them.You ( ) talk to the driver when the school bus is moving.You ( ) clean the
You ( mustn't ) step on the grass.
You ( must) put the books back after you have read them.
You ( mustn't ) talk to the driver when the school bus is moving.
You ( must) clean the classroom every day.
You ( must) wait in line for the school bus.
You ( mustn't) talk too loudly in the reading room.
You (mustn't ) draw on the blackboard.
You ( must) return the books in time.
must的意思是一定要,而mustn't的意思不是不一定要而是不可以