——How long have you lived with your grandparents?——For about three days.答语加不加for?

How long have you been how　long　have you been in China?——Since last Wednesday 啥意思 How long have you been like this?——Every day since （ ）mouth. how long have you been —— this school?为什么不用On 用in? How long have you been in America?——I was five横线中应填什么 How long has the film been__________(开始)..Have you heard from your e—friends__________(最近). how long have you been learning english? How long have you been studying? How long have you been in China? how long have you been dancing today? how long have you studied in this How long have you been there? How long have you live in China How long have you ----(live)here? “How long have you been watching ——have you been a reporter For about five year s.A.How often.B.How old C.How long.C.How soon —How long have you had the bike?—Since last week什么时态为什么用have和had？ 为什么how long提问,答语前面要加for—How long have you lived in China?—For about three years.为什么答语前面用for啊?