I have send off the letter for him 这个句子是不是有错误?have和send都是动词,不能直接连用?

I have send off the letter for him 这个句子是不是有错误?have和send都是动词,不能直接连用? i have kept you completely off the i have seen the gift u send to me I have the whole week off from the stationery store I have off duty 英语单项选择题(which is the best?Tell me why?)1 My good friend Jane will go back to her country tomorrow.I'm going to __ at the airport.A send off her B send her off C see off her D see her off(send off 跟see off ）2 My father has ___ in the send 和 send to 的区别下面两个句子哪个正确?I have received the letter you sent me.I have received the letter you sent to me. I have ____weeks_____in the summertime than Jim.more on more off fewer on more off理由 i got the day off.i have the day off from work.是我请假了,还是放假了? I want to have the song which name is down,can you send me one? 这句啥意思?I have send it Sorry,I'm late.I ---the alarm clock and gone back to sleep againA might have turned off B should have turned off C could have turned off D need have turned off I should(of/have/off/'ve)__known better than to (of/have/off)__knocked the (of/have/off)__the table空格里 应该填什么?I should(of/have/off/'ve)__known better than to (of/have/off)__knocked the cup(of/have/off)__the table i usually work 9-5,monday through friday.I have the weekends off. Do I have to ____(turn) off all the lights when I ____ (leave)? have not i told you that the computer wants__?sorry,i forgot __it fixed .i will send it for repairs right away.repairing to have I want to send the letter是什么意思 I often send and receive___on the Internet.