I have heard him speak about you often.为什么用speak而不用speaks?

3.-Have you heard from him yet?A.I don't mind B.Yes,I have 翻译I don't think you've heard of him before,have you? I have heard him. about you oftenA. mentionB. readC. speakD. to speak I have heard him speak about you often.为什么用speak而不用speaks? He is the person.I have heard about him并句 I have never heard him compain.he is always willing to help怎么样翻译 I have never heard him compain.he is always willing to help怎么样翻译 I have never heard him complain.He is always willing to help.英译汉 I have never heard of him,_____ ?A. have IB. haven't IC. have youD. haven't you A:Have you two met?B:No,but I heard a lot about him I've heard a lot about you.为什么这句话是现在完成时,而No,but I heard a lot about him 却用一般过去时? I've never heard of him before. 92.I _____ him a second letter before I _____ from him.A.wrote… heard B.wrote… had heard C.had written… heard D.have written… hear I have never met Carl before ,nor have I heard of himI have never met Carl before ,nor have I heard of him为什么这句话是并列句,我感觉是复合句,他们的主语不都是I neither和 nor 怎么用?--have you been in touch with tom since leaving school --i have never seen him ,_____ heard from him.A neither i have B nor have i C nor had i D neither did i I heard him singing改为被动语态which is correct?then I heard him sing? 一道单选题I have never heard _______ him before.A.of B.about C.in D.out You've heard of him,haven't you?什么意思?要是回答：Yes,i have 又是什么意思? I heard him singing there改被动句是heard singing还是heard to sing