现在进行时结构：be doing

I	am	driving
he/she/it	is	working
we /you/ they	are	doing

I

am

driving

he/she/it

is

working

we /you/ they

are

doing

什么情况下用现在进行时？

以下小编分为3种情况哦

• 说话的时候正在发生，动作还没有完成

1. Please don’t make so much noise, I am working. (不能用 I work)

2. I am tired, I am going to bed now, goodnight!( 不能用go to bed)

3. Heiilo, Jane, are you enjoying the party? (不能用 do you enjoy)

• 在一段时间内都在持续发生的事情，未结束

（1）根据语境判断：

1. I am reading an interesting book at the moment. (在这期间看书，不代表说话的时候就在看)

2. Some friends of mine are building their own house. They hope it will be finished before next summer.(在这段时间在做，但是未结束。)

（2）根据时间状语判断：today/ this week / this evening

1. Is susan working this week?

2. You are working hard today.

• 强调变化，发生转变时

1. The population of the world is rising very fast. ( 不能用rise)

2. Is your English getting better? (不能用 does your English get better?)

以上三种情况就是现在进行时的情境，看到这儿明白了吗？