1. front

I'm going to put it here, in front of the window.
我准备把它放在这儿,放在窗前。

He sits at the front of the class.
他坐在教室的前面。

The policeman searched the front of the car.
警察搜了车的前部分。

2. in front of

Don't swear in front of the children.
不要在孩子面前讲粗话。

It's bad for your eyes if you sit in front of the TV for too long.
长时间看电视对眼睛不好。

3. careful

Be careful! Don't drop it.
小心点!别摔了!

Be careful while crossing the road.
过马路的时候要小心一些。

He is always a careful driver.
他是一个非常细心的司机。

4. vase

What are you going to do with that vase, Penny?
你打算如何处理那花瓶,彭妮?

Your vase is beautiful.
你的花瓶很漂亮。

Put the flowers in the vase; they look nice.
把花瓶插在花瓶里,花很好看。

5. drop

I must have dropped my book on the bus.
我肯定是把书掉在公车里了。。

May, you've just dropped a letter on the floor.
梅,你把一封信掉到了地上。

6. flower

Those flowers are lovely, too.
那些花也很漂亮啊。

There are all kinds of flowers in the garden.
花园里有各种各样的花。

She received a bunch of flowers this morning.
今天早上她收到了一束花。