For how long have you been using Skype?

How long I have yo wait 什么意思?How long I have to wait 不好意思 打错了 连词成句 how,me,have,long,waited,you,for(?) How long have you been looking for a job? For how long have you been using Skype? --( )David and Vicky( )married?--For about three years. A How long were;have beenB How long have;have been C How long have;been D How long did;get - -Jack!Have not seen you for long!- - -John!__________A.How are you?B.How time flies. (since/ for)-- how long have you benn here?(since/ for)-- how long have you benn here? --__(since/ for) vhalf past three.选择哪个?为什么? how long have you studied english for?请问for 多余吗? how long can i have them for?请问 这句子里为什么有个for How long have you been How long have you been a teacher How long have you been a teacher I have been a teacher for 1998. 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? —have they studied English They have studied English for three years.A:How long B:How soon How long does it take to travel from Shanghai yo Tokyo by plane?为什么用How为什么用How long Do you remember____in Paris last year?A.how long have you stayed B.how long did you stayC.how long you stayed D.how long you have stayedDo you remember____in Paris last year?For only three months.A.how long have you stayed B.how long did you stayC.ho How long have you been in hongkong?l have been here for a week.have you visited Disneyland? i haven't seen you for a long time,how have you been recentely? For how long have you been away from home可以把been去掉吗?