He collected shells two weeks ago.同意句It____two weeks ____he collected shells.

He collected shells two weeks ago.同意句It____two weeks ____he collected shells. Bob has a great collection of shells. He has been ___shells___ three years. A.collected,since B.collecting,about C.collect,during D.collecting,for shells I have been collecting shells for three years.和 I have collected shells for three years.在语法和意 I have been collected shells since Isaw her.和I have been collecting shells since I saw her哪个对? How long have you been collecting shells?与How long have you collected shells?的区别还要介绍一下现在将来时! he has collected 4( boxes of / boxes) stamps选哪个? he has collected 1000 cool stamps in his 加年龄 shells是什么 Tom is a shell fan,He likes c shells 填什么 Hardly ___________ the papers on his desk when the door burst open.A.he collected B.he had collected C.did he collect D.had he collected选出答案并请说明原因,那为什么要用过去完成时呢？ stop后接什么词性例题：Please stop ( )shells,We have no place for them.A.collect B.collecting C.to collect D.collected小生问一下,什么时候加不定式,什么时候加ing.我这样理解对么? He collected little things on his way.Then he put all the things in the bag collected,and,he,food,took,house,into,he连词成句 3.He started to collect shells about 4 years ago.( 用for about 4 years 替换4 years ago) He has collected stamps since ten years age 对since ten years age 提问用什么? 翻译一条英文句子 He saw everything that there was to see and collected many memories. He collected everything that___to her and took them away.为什么这里不用were belonging