——HOw long have they been watching TV ——For 急i!

——HOw long have they been watching TV ——For 急i! —How long have you been here?—For about 10 years,And I _____ “How long have you been watching How long have you been in America?——I was five横线中应填什么 I have been watching TV for two hours.____is two hours____I 如题I have been watching TV for 2 hours.这个句子中那些是主语,谓语,宾语? —How long have you been here,Susan?—Only about h 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 they been dating和how long have they dated?区别? For this,I have been waiting long