Simple past VS.present perfect PS:耀快~Use the simple past of___________________________________________.Use the present perfect for_______________________________________.

Simple past VS.present perfect PS:耀快~Use the simple past of___________________________________________.Use the present perfect for_______________________________________. simple past&past continue tense Simple past tense past simple帮帮忙哦! past simple神马意思 simple past tense 是什麼意思? talking 的simple past tense past perfect vs.simple past.Choose the correct verb form.Sam ___________yesterday.a.left b.has left c.had left d.leavingSam____________when you__________.a.had already left,called b.left already,called c.has left,call d.leaving,calling. present simple,present continuous ,past simple ,past continuous ,past perfect每个时式作一句句子, past simple present continuous present simple the vervto be' present simple to past simple是什么意思（急!） 英语翻译past simple；personal pronoun；present continuous；present simple 用present perfect tense ,simple past tense , the simple past tense的中文 past simple passive 好像是语法 Base from,Simple past,Past participle各是什么意思? Simple past和past perfect那个较早发生 什么时候该用 present perfect 什么时候该用past simple?