or和and的用法与区别
and“和”,A and B，表示连接。意思是“A和B”
or“或者”，表示选择其一，A or B,"A或者B"
当有and的肯定句改为疑问句或否定句时，把and改为or

1.or和and都有“和”的意思，or用在否定句和疑问句中，而and用在肯定句中。
并列结构中，or通常用于否定句，and用于肯定句。
2. or用于连接并列的单词、词组、短语或句子,表示"或者"，如:
We can visit the WorldParkor travel around the world.
我们可以参观世界公园,或者周游全世界。
3.or用在选择疑问句中,灵活译为"还是"。如:
Is that an apple or an orange?那是苹果还是桔子?
Is he a doctor or a teacher? 他是医生还是教师？
Does he like milk or bread? 他喜欢牛奶还是面包？
Are they singing or reading English? 他们是在唱歌还是在读英语？
对其回答不用“yes”或“no”，而应根据实际情况直接选择回答：He likes milk.或：He likes bread.
4.or用于否定句中,代替and ,表示"和"的意思。如:
There isn't any air or water on the moon.月球上既没有空气也没有水。
The baby is too young. He can't speak or walk.那婴儿太小，他不会说话，也不会走路。
He hasn't got any brothers or sisters.他没有兄弟和姐妹。
I don''t like bread, rice or porridge.我不喜欢面包、米饭和粥。

用 and 和or 完成下列句子：
1.Is that an apple ______ an orange?
2.I have a brother ______ a sister.
3.There is no air ______ water on the moon.
4.I don't like bread , rice ______ porridge.
5.There is no air ______ no water on the moon.
6.Mr. Smith is an English teacher ______ he teaches us English.
7. — Would you like to go to the concert with me tonight?
— I’d love to, ______ I can’t. I have a lot of homework to do.
8. Do you like to have Chinese food ______ western food?
9. I like swimming ______ skating. They are so cool.
10.She can’t sing ______ dance,

11.The boy is only ten， _______ he can do some washing himself．
12.He is rich， _______ he isn't happy