We have been good friends ( )we joined the same ping-pang team.A.after B.before C.since Duntil为什么不能用afterafter 前不能用完成时吗

we would have been very good We have been good friends since we met at school. Thank you!We have been so good friends什么意思 We have been good friends for five years对for five years 划线提问--- ---have you been good friends? We have been ```` we have a good we have a good We first met two years ago,and have been good friends since then.这里的have been是什么时态 是因为we are good friends所以变成have been 一般不是用have become的吗。 We have been good friends since 2 years ago.这句话对么? We have __(实际上)been good friends for about twenty years we have been good friends over twenty years.同义句转换 we have been good friend for many years goodfriends 和for many years 句子成分 We （have been） good friends since we met at school.为什么用have been?还有Why not (go) to the cinema with me?为什么用go? We have been good friends ( ) we joined the same pingpong team.A afterB beforeC sinceD until说一下为什么 We would have been very We have been moving fomward! 是have been well还是 have been good啊 we have a good time!