Tom has been studying the electronics since he left school two years ago 为什么用 has been studying给我再细讲讲 现在完成时

all the students except tom has been abroad改错 Tom has been on the island since two years.(改错) it is 3 years since Tom has been abroad tom didnt smoke has been two years有语法错误吗 Tom has been a________(成员) of the volleyball team Tom ________France .He _____Paris for three weeks.a.has been to :has been tob.has gone to :has been inc.has been to:has been ind..has gone to; has been to并说明原因 Tom got sick last May and has been in bed since then.为什么has been 而不是had been the room has been cleaned by tom 对tom提问____ ____the room____ cleaned ____ Tom’s grandfather （has been dead） for five years为什么不是has been died? 告诉我原因谢谢. 这句话有几个助动词The work has been done by tom .has 和 been哪个是助动词 为啥 Tom has been in China for three years.(改为同义句)1.Tom has been in China ( ) three years( ).2.Three year ( ) ( ) ( ) Tom cane to China.3.Tom ( ) ( ) China three years ( ).4.It is ( ) ( ) ( ) Tom came to China. Tom has been in China for three years.(改为同义句)1.Tom has been in China ( ) three years( ).2.Three year ( ) ( ) ( ) Tom cane to China.3.Tom ( ) ( ) China three years ( ).4.It is ( ) ( ) ( ) Tom came to China. Tom ( ) the Islands of Hawaii.He surfs three times a day there .A has gone to B has gone on C has been for D has been I have been to the Water World .Tom has been there,too句行转换句型转换1.I have been to the Water World .Tom has been there too_______Tom_______I have been to the Water World -I have been to hongkong.-____.he went there last summer A.so has tom B.so did tom C.so tom has D. has been Tom has been ill for three days.改为否定句,一般疑问句和被动语态 Tom said he has never been to Hong Kong.反义疑问句