has to的否定形式是什么
has to的否定形式是dont have to；
hashave 的第三人称单数现在时形式；
havev.有；持有；占有；由…组成；显示出，
You don\'t have to be a genius to see that they are in love!
傻子也能看出他们相爱了！
You don\'t have to do anything ─ just lie back and enjoy the ride.
你什么事也不必做——只管悠闲享受乘车旅行的乐趣好啦。
I know I was stupid; you don\'t have to rub it in.
我知道我当时很愚蠢；你不必老提这件事。