有关于have to的文章英语时态问题再文中有几个句子：i will be busy that day.in the morning.i have to do my homework. i have too much homework.本文的时态应该是将来时的,为什么会出现现在时的呢?have to不是有wil

有关于have to的文章英语时态问题再文中有几个句子：i will be busy that day.in the morning.i have to do my homework. i have too much homework.本文的时态应该是将来时的,为什么会出现现在时的呢?have to不是有wil 有关于have to的文章英语时态问题再文中有几个句子：i will be busy that day.in the morning.i have to do my homework.i have too much homework.本文的时态应该是将来时的,为什么会出现现在时的呢?have to不是有will 关于新概念英语第三册 “a puma at large的一个时态问题就是文章的第一段中 .the descriptions given by people who claimed to have seen the puma were extraordinarily similar.这里是have seen 再接下来就是 the hunt for t 这里不定式的时态问题have to be built 什么时态啊（这里应该也有被动语气吧）和have been built的区别 have to,must时态的差别．时态上有什么区别have to不能和什么时态一起? 关于英语时态的问题,英语中总共有多少种时态我想问下英语中总共有多少种时态,标准的权威官方的发布,英语的时态有多少种? 关于时态的问题have beenhave been 和have had been有什么区别?原句是这样的：I've heard has been good.有have也有has 关于英语现在完成时态的小问题_____ you ______Dianche Lake these days?Yes,I have.The water is getting cleaner and cleaner and the mountains are more beartiful.A Have;gone to B Have; been to C Have;been in 英语高手帮我看看这句话的时态吧,总觉得有问题,谢谢!While in some countries people’s basic supply and nutritious needs have been met, they began to pursue better health. you have to wait until the soup becomes cold时态叫不准，还有所有跟 if 有关的时态问题 关于have的用法1.当have表示‘有’时,与（）同等意义,即have=（）.2.have与to一起构成情态动词have to,表示（）,可用于各种时态. 英语时态问题不懂!Nancy is supposed to (...)做完化学实验at least two weeks ago?答案为什么是have finished her /the chemical experiment?为什么用完成时?这里不是有two weeks 应该用过去时态啊! 有没有关于英语时态的论文,或者详细介绍各种时态的文章.我想知道各种时态之间的区别和练习.好的话,要多少分给多少分.最好是一些专家自己对英语时态的看法,所写的一文章. 关于将来时态的表达有哪些?(英语的） 英语当中“不得不做某事”的表达只是had to 还是 have to has to 也可以 我一直高不清楚 有人称和时态的变化吗 关于“去”的英语 （问的是时态）他去过美国（表示以前去过,现在回来了）他去了美国（在美国呆着,不在说话现场）他马上去美国have been to, have gone to, went to,go to,be going to等等 有什么区别? I have spent all my spare time to study English from one month before这句话的时态有问题吗? 英语一般过去式和现在完成时的区别I went to beijing 和 I have been to beijing 意思上有什么区别?能不能举例区分这两种时态?