I felt better after having a nap.此处为何要用having 而不是过去式?

I felt better after I took some medicine 改为同义句I （ ） （ ）better （ ）I took some medicine the medicine ____(有效）.I felt much better after taking some. I felt better after having a nap.此处为何要用having 而不是过去式? i felt much better after i ___take the medicine.我填的是took答案是had taken.为什么呢? I ____[feel] better after I ____[take]dicine.A.felt ;had taken B.felt;took 并说明理由我选的B,可老师说的A He felt better after ——（drink） the medicine after I read for two hours ,I felt _______(boring) I feel better after the medicine w______. I felt ＿(happy happily) after birthday party...怎么选 After ______(run) I felt very thirsty答案及原因 I could have done better ,but i didn't .I felt so sad .I' m sorry. i felt deeply affected after read the news.after后read 是不是存在语法错误 I felt I had a bad s____ .Itook some medicine and felt better. 【【英语语法】】I've never felt better.注意什么语法?什么用法?造句?RT 【英语语法】I've never felt better.注意什么语法?什么用法?造句?RT I feel much better after drinking a cup of I hope everything could be better after crying