如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么?

do you know if he will come为什么if后面用将来时如题,急 如,Do you know if he will come back next month?if he comes back,please let me know?语法点是什么? Do you know ----------he will be back.that或if, Do you know if ____back next week?If he ___ back,please let me know.为什么 do you know that he is right?和do you know if he is right?哪个正确?为什么? do you know English?he asked(改为间接引语) he asked if ----- ----- English. do you know ___(he)? If you know what will you do -Do you know if Jim____ to piay football with us - I think he will come if he ____ free tomorrow. do you know when the meeting begin?BLANK he comes backA if B when C until ：-Do you know if he is coming?-It doesnt hurt to ask,does it? Do you know if he will play basketball with me 这句有没有错误? Do you know what he does 还是 he does what如题 I heard that he had fallen ill for three days.Do you know if he is better now?单句改错 2.Do you know if he ___ to play basketball with us?I think he will come if he ____ free tomorrow.为什么 Do you know who is he? Do you know _______（he） What does he do?Do you know?(改为宾语从句)Do you know ----- he -----