“现在完成时，have/has+过去分词.比如I have loved you 3000 times.爱过又怎样？现在呢？ “定语从句，跟屁虫语法。记住口诀，看见名词带保镖，which/that/who来放哨。比如The idol who has a 8-pack abs is my老公.（who追着名词idol跑）。” “遇见人用who，遇见物用which，that是个墙头草，男女通吃但要命，前提是不能用逗号时才能用。例如My math teacher , who wears the same shirt every Monday, which makes us怀疑他买了七件同款...逗号后必须用which。” “非谓语动词：to ...