1你最好快点,否则上课会迟到的.汉译英2你最好走动轻点,否则会弄醒他.汉译英

You'd better hurry up, or you'll be late.
You'd better walk more quietly, or he'll wake up.

you'd better quickly or you will be latter for school
you'd bettle walk quietly or you will wake him up

You'd better hutty up,otherwise you will be late.
You'd better move quietly,or you will wake him up.

hurry up ,otherwise you will late for class.
please walk slightly , otherwise you will wake her up .
感觉较口语化了，你可以考虑到虚拟语气