EW20140605

1.terrible ['terəbl]
adj. 可怕的；很糟的；令人讨厌的
adv. [口]很，非常
you are always terrible .

2.always ['ɔ:lweiz, -wiz]
adv. 永远，一直；总是；常常

可以用于一般现在时，比如：He always eats dinner at home.
也可以用于一般过去时，比如：He always thought that he was popular in our class.
还可以用于一般将来时，比如：You will always be my friend.

3.popular ['pɔpjulə]
adj. 流行的，通俗的；受欢迎的；大众的；普及的


4.invite [in'vait, 'invait]
vt. 邀请，招待；招致
n. 邀请
You can invite your friends to join the group.

5.while [hwail]
conj. 虽然；然而；当……的时候
n. 一会儿；一段时间
vt. 消磨；轻松地度过

while you are join in the group.
I've(have) got to leave for a while. Let's talk later.

The moment 区别
我一看见她，就把东西交给她。
While有持续性

when while区别
when一般只在某个时间点。如：
Someone knocked the door when I was about to leave my house    .

while 常指在某个时间段，一般与进行连用．如：
We were watching TV at home while It was raining hard

另外，while还有”然而”的意思，而when没有．