I think it isn't possible ...I don't think it is possible...这两句有什么区别?

I think it isn't possible ...I don't think it is possible...这两句有什么区别? I don't think it's good 和 I think it isn't good 意思一样吗? This ruler isn't mine.I think it is ( ) A.heThis ruler isn't mine.I think it is ( ) A.he B.him C.his D.her this isn't hers,i think it's histhis isn't mine,i think it's your.为什么这样是错的? No,it isn't mine.I think it's his baseball.写出问句. No,it isn't.It's______big.I think(认为）________Li Ming's I know it isn’t no,it isn't（ ）.i hink it‘s mike’s .is it yours ,mike?yes,i think（ ） Tom isn't good at Maths.I think he needs to do more_____about it. i think you will understand,but everything is wrong ,isn 't it 英语翻译I think you are the pig ,isn't it?是的 改正.不是 翻译. I think donate money to charities is helpful,isn't it?改错 I don't think this is right,A.do IB.don't IC.is itD.isn't it I don't think it is useful for me to finish the task ----?A can it B is it C can't it D isn't it 为什么 一般用I think it isn't funny还是I don't think it is funny.为什么?两者意思一样啊 I think there is 的反意句是i don't think 还是i think there isn't I think it great to see documentaries.A./;isn't B.don't;isn't C./;doesn't D.don't;is1.I think it great to see documentaries.A./;isn't B.don't;isn't C./;doesn't D.don't;is A还是D2.but you wash your hands firstA.may B.must C.can D.need i think it must be in your room,____?A isn't it B mustn't itC needn't itD wasn't it