2.will/would表示“习惯”

will/would表示“习惯”、“规律性动作”和“习惯性预测”，will指现在时，would指过去时。(参见一般将来时和过去将来时)

When you are walking on the street，they will often stop and look right into your eyes while talking．(人教大纲版高一上第119页)

当你在街上走的时候，他们会经常停下来，然后在和你交谈的时候，直视你的眼睛。

Some birds will fly away to the south when the weather turns cold．

有些鸟在天气冷了的时候会飞向南方。

If he found a patient listener，he would pour out his troubles．

每当他找到一位耐心的倾听者，他总会把一切烦恼都倾吐出来。

In the spring the birds would return to their haunts，and the woods would be filled with their music．

春天的时候这些鸟儿归来，森林里就会鸟语一片。