it is raining hard outside .you`d better ----(not go ) out for a walk

it is raining hard outside .you`d better -not go---(not go ) out for a walk
had better do sth 固定用法 最好做某事
否定则在do前加not
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it is raining hard outside .you`d better not go （not go ) out for a walk
【had better do sth】最好做...
用动词原形
有不会的可以再问我

it is raining hard outside .you`d better not go out for a walk
had better它的后面要跟动词原形;had better只有一种形式,没有has/have better这一形式;它的否定式是在它后面加not:
You had better go now你最好现在就走
He'd(=He had) better do it now他最好现在做
She'd better not cry她最好别哭

就是not go

not go
had better 最好 可以当情态动词用 后接动词原形do sth 如果跟否定意思 就接动词原形的否定形式 not do sth