It’s two weeks since Tom arrived inaustralia.改为同义句Tom＿＿＿ Australia for two weeks.请解释一下到底该用has been ,还是has arrived

It's three weeks since you were ill(什么意思) Is it two weeks since he left London 可以这样改吗He has been to London for two weeks It’s two weeks since Tom arrived inaustralia.改为同义句Tom＿＿＿ Australia for two weeks.请解释一下到底该用has been ,还是has arrived It has been two weeks since I last wrote to you.意思? It is two weeks since we met last time 是什么从句? The National Day is coming.It is__A two week's away . B in two weeks' timeC in two weeks' away D. two weeks far .He’s borrowed the book since two weeks ago,hasn’t he?________ I have stayed at my aunt's since two weeks.同义句是什么 it's been several weeks since he___(join) the music club有since的话后面要用什么时态 改错句:It is two weeks since I have seen him要说出具体原因,确切点 He's borrowed the book since two weeks ago,hasn't he?A B C D 改错 He's borrowed the book since two weeks ago,hasn't he?A B C D 改错 I haven't seen her ()A.two weeks ago B.since two weeks C.for two weeks D.before two weeks选什么为什么?句意? It's two years since he left his hometown.since 为什么不能换成after 用“since two weeks ago的现在完成时造句”要汉语 对since two weeks ago提问用什么词 英语翻译 it's my birthday in two weeks time and l'll be 82 year old It‘s two weeks _______ he _______ Shanghai.他离开上海两个星期了