一、一般过去将来时

形式：would+动词原形和was/were going to+动词原形

用于描述过去某时间里对于未来的想法和猜测。

二、虚拟语气（对现在和将来情况的虚拟）

形式：would/should/might/could+动词原形

用于描述不能实现或者纯粹是家乡的情况。

例句：

1、I was sure that I would work in a small city when I was a child.

在我很小的时候我就觉得我会在一个小城市工作。

2、If I were you, I would choose to work in a small city. 

如果我是你，我会选择在小城市工作。（事实上我不是你）

解析：例句1中表示的在过去小时候对于长大的猜测；例句2表示对未来的情况虚拟。

例句：

1、You told me that you would talk with your parents. 

你告诉我你会和父母谈谈的。

2、If you talked with your parents, something wouldn't happen. 

如果你和父母谈过了，有些事就不会发生了。（你没和父母谈过）

解析：例句1中表示的在过去我会怎样做；例句2表示对现在情况的虚拟。

扩展资料

过去将来完成进行时中“would + have + 过去分词”的情态用法

1、Only somebody with a small mind would have refused to help others.

只有心胸狭窄的人才不肯帮助别人。

解析：这里的would表示推测意义。

2、Few men would have bared their soul to a woman as he had.

很少有男人能像他一样对一个女人敞开心扉。

解析：这里表示怀疑的意思。

3、I'm surprised you didn't like the book. I would have thought it was just your piece of cake.

你居然不喜欢这本书，我本来还认为这正符合你的口味呢。

解析：表示过去的想法。