had better后加doing吗
had better do sth 是正确的。
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。
1、had better do sth的反义词：had better not do sth
It is pretty cold. You‘d better put on my coat.
外面天气很冷，你最好穿上我的外套。
2、had better have done sth表示与事实相反的结果，意为"本来最好"。
You had better have come earlier.
你本来最好应该早点来。
扩展资料
同义词：
一、it would be best
英 [ɪt wʊd bi best] 美 [ɪt wʊd bi best]
最好
1、It would be best if you could teach it directly.
如果你可以直接教导，将是最好的选择。
2、I think it would be best if I talked to her.
我想让我跟她说的话会比较好。
二、it is better to do
It's +adj+（for sb+）to do，better是good ,well的比较级。
it is better to do calibration before you start scanning any business cards, it could ensure you obtain a better quality image of the business card.
第一次扫描名片之前，最好先做扫描仪校准，这样能确保扫描名片时获得最好的图像质量。
是的。
had better 后面通常跟动词的-ing形式。
这种结构常用于表达强烈的建议或警告。
例如：
You had better start studying for the exam.（你最好开始为考试复习。）
He had better stop procrastinating and get to work.（他最好停止拖延开始工作。）
We had better be careful while driving in the rain.（我们在雨天开车时最好小心。）
You had better not be smoking in here.（你最好不要在这里吸烟。）
We had better not be late for the meeting.（我们最好不要迟到会议。）
这种结构也可以用于否定形式，即"had better not + 动词的-ing形式"，表示禁止或警告。
例如：
