单词的积累和语法的掌握是学习英语的重中之重，也是最难的地方。下面是小编给大家分享的英语学习必须要掌握的语法知识，大家可以作为学习的参考。
过去进行时的用法：
1. 构成
was / were+动词的现在分词。
2. 基本用法
表示过去某一时间点或一段时间正在进行的动作。如：
What were you doing this time yesterday? 你昨天这个时候在干什么?
Granny fell asleep when she was reading. 奶奶看书时睡着了。
He was writing a book about grammar last year, but I don’t know whether he has finished it.他去年在写一本语法方面的书，但我不知道他现在是否写完了。
What were you talking about just now? 你们刚才在谈什么?
He was working from 7 to 11 last night. 昨晚他从七点一直工作到十一点。
过去进行时与 always, forever, continually等副词连用，表示满意、称赞、惊讶、厌恶等表示感情色彩。如：
My brother was always losing his keys. 我哥哥老是丢钥匙。
The boy was continually asking the same question. 这个男孩子老是问同一个问题。
过去将来时的用法：
一、基本结构
would+动词原形。
二、基本用法
表示从过去某一时间来看将要发生的事情。常用于宾语从句中。如：
He said he would come. 他说他要来。
He told us he would go with us. 他告诉我们他会和我们一起去。
They were sure that they would win. 他们坚信他们会赢。
【注】在一定的语境中也可于其他从句或句子中：
It was a problem whether they would support us. 他们是否会支持我们还是一个问题。
It was six o’clock. The sun would soon set. 这时是六点钟。太阳即将落山。
过去将来时常可用来表示过去习惯性的动作。如:
Whenever he had time, he would help his mother with the housework. 他一有时间就帮妈妈做家务活。
还可用来表示愿望或倾向。如：
He told me that the machine wouldn’t work. 他告诉我机器开不动。
We knew that he would never permit such a thing. 我们知道他决不会允许发生这样的事。
表示将来时的方法：
①主要表示预先经过考虑的计划或打算。如：
I’m going to make a dress with the cloth I bought yesterday. 我打算用昨天买的布做个裙子。
We are not going to stay there long. 我们不准备在那里久待。
Where are you going to spend your holidays?你准备去哪儿度假?
②表示有迹象表明要发生某事。如：
Look at the black clouds— It is going to rain.看那乌云— 天要下雨了。
There’s going to be a lot of trouble about it. 这事肯定会有许多麻烦。
Li is putting on weight. She’s going to be quite fat. 李的在体重增加，她会很胖的。
英语的学习需要长期的积累和掌握，学习过程中掌握方法很重要，方法用对，学习才能提高效率。
