if和and能不能连用比如是if the students have too much homework ,and they have no time to enjoy thenselves 还是 so the students have too muchhomework ,and they have no time to enjoy thenselves前面一句是but the teachers don't think so

if和and能不能连用比如是if the students have too much homework ,and they have no time to enjoy thenselves 还是 so the students have too muchhomework ,and they have no time to enjoy thenselves前面一句是but the teachers don't think so if能不能与or连用 if和and /or 函数的运用?为什么if 有时和and/or 连用?and/or 启什么作用? because和if能连用吗? if 和or not可以连用吗 though能不能和and连用如题如果能连用的话,举行是怎样的 if 能不能与or not连用?She tells me___my pictures are good or not.这道题填whether更正确,可是能不能填if?我听说if不能与or not连用 I am not sure if it will be fine or cloudy?我知道if不能和or not连用,但if能与or连用吗?比如：The police are not sure if the child has been kidnapped or killed.这句话是否正确? must和can能不能连用? though和also能不能连用 “If.If.If...If.But there is no If in the world.Only aftermath and result”是什么意思? if到底能不能跟or not 连用呢..or not 和if...or not的区别吗。比如说什么宾语从句后什么的还有还有 If you are not sure __a woman is married or not.中答案写whether那为什么就不可以用if了 如果句子是一般将来时,和if连用的动词是什么时态 weather和if在宾语从句中的区别,特别是什么时候与or...not 连用 If you ever find yourself 啥意思If you ever find yourself啥意思Lost and all alone 迷茫又孤独 ever不是更完成时连用吗 if you are 和 if you were求辨析If you are the one.和If you were the one. EXCEL中OR和AND连用表示什么?在判断年份是否为闰年时,在网上查到了可以用这个公式,=IF(OR(AND(MOD(A1,100)=0,MOD(A1,400)0),MOD(A1,4)0),平年,闰年),可是我不懂为什么要用OR和AND连用呢? If I had had enough time,Iwould have done the work better.这句话为什么有两个had连用?