are vi. (用于第二人称单复数现在时，第一、三人称复数现在时)是
1.How are you?
你好吗？
birthday n. 生日
1."Today is my birthday." "Happy birthday (to you)!"
“今天是我的生日。”“祝你生日快乐！”
but conj. 但是，可是 prep. 除了，除……外
1.This watch is very nice but too expensive.
这块手表很好，可是太贵了。
2.On the mountain it was sunny but it was cold.
山上阳光充足但很冷。
for prep. 为了……；向……，往……；与……交换；防备……；适合……；因为……；在……期间；对于……；对……来说
conj. 因为，由于
1.Can you post this letter for me?
你能替我寄这封信吗？
2.I'll buy some food for dinner.
我要买一些晚饭吃的食物。
3.The phone call is for you.
你的电话。
4.This question is difficult for him.
这问题对他来说有些难了。
5.I'm sorry for it.
对这件事我很抱歉。
happy a. 幸福的；快乐的；高兴的；恰当的
1.I have a happy family.
我有一个幸福的家庭。
2.That was the happiest day of her life.
那是她一生中最快乐的一天。
how old 几岁
1.How old are you?
你多大了？
too ad. 也，还；又；太，过分；很，非常
1.I can speak English too.
我也会说英语。
2.You're asking too much.
你问得太多了。
You're welcome! 不客气！
1."Thanks, Jenny!" "You're welcome!"
“谢谢，詹妮！”“不客气。”