30. Is that all !

1. 单词部分

envelope  n.信封

writing paper n. 信纸   a piece of writing paper

shop assistant 售货员

size  尺寸，尺码，大小  small , medium , large , extra large.

pad n. 信件薄

glue n.胶水

chalk n.粉笔   a tick of chalk.  tick 条状物，一条，一根

change n.零钱    keep the change

1 pm / 2 pm  下午1点

1 am  早上1点

2.课文讲解

only

I only have large ones.    Only I have large ones.

Only I can help you. I have can help only you.

That's all.  

else adv. 其他，另外

What else do you like?  你还喜欢别的吗？

Who else do you know? 你还认识别的人吗？

Who else can she be? 她可能还在别的地方吗？

3. 语法讲解

数词

基数词

one , two , three, four,five,six, seven,eight,nine , ten , eleven,twelve

thirteen, fourteen,fifteen,sixteen,seventeen,eighteen,nineteen

teen adj. 十几岁的，青少年的 ； n. 青少年

twenty,twenty-one,...

thirty, thirty-one, thirty-two,...

forty, forty-one, ...

fifty, fifty-one, ....

sixty,sixty-one , sixty-two, sixty- three, ...

seventy ,seventy-one,...

eighty,...

ninety,...

hundred

one hundred , two hundred, three hundred,...

nine hundred and ninety-nine  999

six hundred and sixty - four  674

five hundred and fifty-eight  558

thousand

one thousand , two thousand,....

three thousand nine hundred  3900

nine thousand nine hundred and ninety-nine 9999

two thousand and forty-five 2048

ten thousand , twenty thousand, thirty thousand,....

one hundred thoushand , two hundred thousand,....

million 百万

one million , two million,....

millionaire  百万富翁，亿万富翁

345,888,666  

three hundred  and forty-five million eight hundred and eighty-eight thousand sixty hundred and sixty-six .

序数词

first , second ,  third , fourth , fifth,...

twentieth , twenty-first

4.知识拓展

62，846,920

sixty-two million, eighty hundred and forty-six thousand,nine hundred and twenty