为什么不是having a good time 而是have a good time 为什么不加ing 不是动词开头要加ing吗?如题、谢谢叻

everyone'having a good time 为什么用aren't they 不everyone'having a good time 为什么用aren't they 不用doesn't everyone'having a good time 为什么用aren't they 不用everyone'having a good time 为什么用aren't they 不用doesn't 为什么不是having a good time 而是have a good time 为什么不加ing 不是动词开头要加ing吗?如题、谢谢叻 Look,they() a good time,() they A.have…doB.have…don'tC.are having…areD.are having… aren't为什么 One talk with him,I believe ,and you will find he is good.为什么不是 Having a talk with him He is having a good time.为什么用having而不用hasing . I didn't have much money to give,so I thought of having a contest为什么不是but呢 He is having a good everyone is having a good ---Tom isn’t having a good time at the moment.---- N_______ am I.---Tom isn’t having a good time at the moment.---- N_______ am I. are you good having a good summer Having a good diet is of great importance to keeping healthy.为什么要用keeping,to不是要跟原型吗?、、 Having a good diet is of great importance to keeping healty.为什么要用keeping .to不是要跟原型吗? the children are having a good time 为什么不是have?Everyone is enjoying themselve 改同义句,我的答案是Everyone is have a good time.我错了,但不知道为什么,请你帮我,谢谢 为什么用having?Not having a good excuse for being late ,sally made one up.前半句中为什么用-ing形式? 高中英语2929._________________ plenty of fresh air __________ good health.A.Having exposed to ; contributes to B.Having been exposed to ; contributed to C.Being exposed to ; contributes to D.Exposed to ; contributes to 为什么答案是C ,不是 having conversation with friends helps a little,having为什么不是to have ____that she didn~t do a good job,I don~t think I am abler than her.A To have said B Having said C To say D Saying选什么为什么,为什么不选B