Tom has been at this school since he come to China.对since he come to China提问.

Tom has been at this school since he come to China.对since he come to China提问. Tom has had been working at Ford company from Jan.5,2008 to Feb.1,2009. tom has dinner at home. Mr Smith ___ at this school since he ___ to Zhuhai.A:has been taught; came B:has taught; has comeC:has been teaching; has come D:has been teaching; came为什么选D?has been teaching是什么时态? 英语语法习题能否解释以下习题:1．Neither Tom nor his parents ___ at home.A.is B.are C.has been D.was这题为何要选B2.All that can be done ____.A.has been done B.has done.C.have done D.were done这题为何要选A3.There __ in this r This account has been blocked. this file has been damage This IP has been banned Our P.E teacher has been at this school since he came.（划线提问） The woodpecker has been pecking at this tree.这个句子是什么时态? I know this has been hard.has been 是什么语法? hello.this is tom.is jack in?sorry.he___for a month.A has been B go C is going D has gone.选词填空.加解析. at tom english has four class 组词成句 Has it been warned that all the children in this area_____stay at their homes until the Bird Flu has been controlled?A.canB.will C.mayD.shall Mr Smith __________ at this school since he ________ Xiamen .A.has been teach,came B.has been teaching,came C.taught,came D.has been teaching,has come has been in和has been at的区别has been in.has been at.has been to.has gone to它们的区别 tom came back home yesterday.—Tom came back home yesterday.—Really?Where ________ at all?A.had he been B.has he been C.had he gone D.has he gone麻烦解释下,had、has时态是哪个?还有has been 与has gone的的意思及其区别 tom()at this school ten years ago