you had better hurry本句为什么用had?这是什么句型?

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youhadbetterhurry本句为什么用had?这是什么句型?youhadbetterhurry本句为什么用had?这是什么句型?youhadbetterhurry本句为什么用had?这是什么句

you had better hurry本句为什么用had?这是什么句型?
you had better hurry本句为什么用had?这是什么句型?

you had better hurry本句为什么用had?这是什么句型?
had better表示最好
had better 相当于一个助动词,它只有一种形式,它后面要跟动词原形.
  had better do sth
  had better not do sth
  It is pretty cold.You'd better put on my coat.
  She'd better not play with the dog.