句型转换（用两种形式改为同义句）
it is time for class.put your comic books away.
you ____put your comic books away.
you ____ ____put your comic books away.
should
ought to
keep your mobile phone off in class.
you ____keep your mobile phone off in class.
you ____ ____keep your mobile phone off in class.
should
need to
don't make the same mistake again.
you ____ ____make the same mistake again.
you ____ ____ ____make the same mistake again.
最后一个 大神帮帮忙
should not
would better not
给好评哦！
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本回答被提问者采纳keep your mobile phone off in class.
you ____keep your mobile phone off in class.
you ____ ____keep your mobile phone off in class.
我觉着跟上面是一样的～祈使句改的～
追问have to 能不能改为had better??
追答可以，意思差不多～