叙事一般用过去式，对应完成时进行时等都要进行变换。
而其中的议论一般是使用一般时，因为是自己的评论。
想法感受等比如感觉疲劳那用过去时，而光荣等能持续到现在的，一般就用现在时。
如果是客观真理事实，那么无论如何都要用现在时。
议论文、说明文一般用一般时。
特别注意在直接引语中要用一般时态（特殊情况除外)1．要是明天下雨的话，这场比赛就要取消。
[误] The match will be canceled if it will rain tomorrow.[正] The match will be canceled if it rains tomorrow.分析：在条件从句里要用一般现在时态表将来，所以will rain应该改为rains.但是will如果表示意愿的话，可以用条件从句或时间从句表将来。
但主语一定要是人。
例如：If you will come, you can.如果你愿意的话，你可以跟我去。
2．地理老师告诉我们，地球是绕太阳转的。
[误] The geography teacher told us that the earth moved round the sun. [正] The geography teacher told us that the earth moves round the sun. 分析：根据时态一致性原则，主句的谓语如果是一般过去时态时，从句一般要与其时态对应。
即从句的时态必须用过去时态、过去进行时态、过去完成时态等。
但如果从句所表达的内容是一种规律、习惯性的东西，从句的谓语也不要改变。
3．你总是犯这个错误。
[误] You always make the same mistake.[正] You are always making the same mistake.分析：be + 频度副词+ 现在分词，这种进行时态，是一种表达具有感情色彩的表达。
一般现在时态不能表达这个含义。
4．我们马上就要出发了，因此没有时间去看他了。
[误] We are about to leave at once, so there is no time to visit him. [正] We are about to leave, so there is no time to visit him.分析：be about to do sth意思是“即将，马上…”。
它不能和以一时间状语连用：tomorrow, at once, soon, in a moment, in time, immediately等。
5．我本来打算去告诉你的，可是我错过了最后一班车。
[误] I would tell you about it, but I missed the last bus.[正] I was going to tell you about it, but I missed the last bus.分析：过去打算要做什么，要用was/were going to do这个句型。
would do 这种将来时态没有计划和安排的含义。
6．转眼间在这里一下就住了十年了。
[误] It is ten years since we have lived here.[正] It is ten years since we lived here.分析：It is + 时间+ since…意思是“自从…以来又有…”。
在此句型中，前面主句的时态应该用is或has been, 在现代英语中，多用is。
从句的时态应该用过去时态，如果前面主句用的是过去时态，后面的从句相应该用过去完成时态。
例如：It was three years since he had joined the army five years ago.7．这是他第二次去美国了。
[误] This is the second time that he went to the United States.[正] This is the second time that he has been to the United States.分析：要表达第几次做什么事，应该用“it is + 序数词+ （that）+ 主语+ have done ”这个句型。
如果该句型里的is用过去时态，那么，从句里的时态也应该用过去完成时态。
那么这个句型为：It was + 序数词+ （that）+ 主语+ had done.8．妈妈对孩子说：“作业没做完，你不出去玩。
”[误] You can’t go out to play as your homework is not being finished. [正] You can’t go out to play before your homework will be finish ed.分析：before 是一个表示时间的连词，它连接的时间状语从句应该且一般现在时态表将来，因此，从句的谓语应该由将来时态改一般现在时态。
9．他们一回到家里，就下起雨来了。
[误] They hardly got home when it began to rain.[正] They had hardly got home when it began to rain.[正]Hardly had they got home when it began to rain.分析：hardly…when/before…是一组连词，意思是“一…就…”。
在这个连词连接的句子中，句子的前半部分应该用过去完成时态。
后部分用过去时态。
在这个句型中，如果hardly放在句首，这个句子应该倒倒装。
具有相同用法与意思的连词还有：no sooner…than…; scarcely…when/before…等。
10．上个星期我们本来打算来看你的。
[误] We hoped to come and see you last week.[正] We had hoped to come and see you last week.分析：had hoped to do 表示过去没有实现的愿望。
类似的句型还有如下：had meant to do (==meant to have done …)had intended to do (==intended to have done …)had thought to do (==thought to have done…)had hoped that + 主语+ would do…11．他打电话告诉我说他丢失的眼镜找到了。
[误] He phoned to tell me that he found the lost glasses.[正] He phoned to tell me that he had found the lost glasses.分析：根据时态的致性原则，主句用一般过去时态时，从句应该用过去时态（过去进行时态、一般过去时态、过去完成时态）。
如果从句的动作发生在主句谓语动词所表示的动作之前，从句应该用过去完成时态。
12．要是我买了昨天的音乐会的票那就好了。
[误] If only I bought the ticket for the concert yesterday.[正] If only I had bought the ticket for the concert yesterday.分析：if only 是一个固定词组，意思是“要是…那就好了”。
这是表达一个针对过去的一个虚拟的愿望。
在该句型中，谓语致词应该用过去完成时态。
类似这样的表达虚拟的句型还有：wish that + 主语+ had done….（希望过去做过…）；would/had rather (that) + 主语+ had don e…。
13．希望你们能够马到成功。
[误] You are hoped to succeed at the beginning.[正] It is hoped that you will succeed at the beginning.分析：hope sb to do sth这外句型是错误的。
hope 不能带不定式作复合宾语。
要表达这个意思有两种方法：①it is hoped that…; ②We hoped that you will…14. 这个问题目前很难解决。
[误] This problem is difficult to be solved at present.[正] This problem is difficult to solve at present.分析：在“…adj + to do”这种结构中，作状语的不定式与该的主语构成逻辑动词关系，习惯上，这下不定式应该用主动表被动。
15. 你应该在8:00 赶到。
[误] You supposed to arrive at 8:00.[正] You are supposed to arrive at 8:00.分析：be supposed to do sth这是一个句型，意思是“理应。
，应当。
，按理。
”。
如果用于否定，意思是“不可。
，不许。
”。
表示一种委婉的禁止。
例如：You are not supposed to smoke in this building.你可不要在这栋建筑物里抽烟。
16. 在那些日子里，那些工人们被迫工作12小时以上。
[误] The workers are made work over twenty hours a day in those days. [正] The workers are made to work over twenty hours a day in those days.分析：动词不定式在使径动词后make, let及感管动词后feel, watch, see, notice, hear, listen to, observe等动词后作宾语补时，常省略to，但转换成被动语态时，一定要加上这个to.17. 这种布摸起来很柔软。
[误] This kind of cloth is felt soft.[正] This kind of cloth feels soft.分析：感管动词feel, taste, sound, smell, look, seem, appear等的主动形式表被动含义。
18. 他讲的英语人家听不懂。
[误] He can’t make himself understand in English.[正] He can’t make himself understood in English.分析：make oneself + 过去分词，这是一个句型，意思是“让自己被人家所理解”。