龟牌水晶极限蜡T-321I和龟牌白金蜡T-411I什么好

I don’t think I can和I think I can’t有什么区别? I don't agree和I disagree有什么区别? I can't believe和I don't believe有什么区别? I don't speak English和I can't speak English有什么不同. I didn't understand和I don't understand有什么区别 I don't cry和I can't cry有什么区别啊? I believe isn't true和I don't believe it's true有什么区别 I haven't got much和I haven't got many 有什么区别? I don't have heart和I have't heart有什么区别 I accept 和 I don't accept h,y,t,r,i,t和t,s,e,h,i,r分别能组成什么单词? i havn't 和 i don't have区别