I've+just+had+lunch改为否定句和一般疑问句？

Question

如题所述

Answer 1

否定句： I haven't had lunch.
一般疑问句: Have you had lunch?

Answer 2

这句话的中文意思是，正好我已经吃完了饭，是现在完成时态，要想变成否定句，只需要在have的后面加not就可以了，否定句形式为:
I haven't just had lunch.意思是那个时候正好我还没有吃饭，还没有完成吃饭这件事情。
他的一般疑问句的形式就是将have和主语换位置，将末尾的句号换成问号，变换一下人称:
Have you just had lunch?

Answer 3

改为否定句是I have not just had lunch.
改为一般疑问句是 Have you just had lunch?