放在开始、结尾、中间都是可以的.
When he was a boy,he walked 30 miles to go to school.
The bird flies from the north to the south at the beginning of November.
The postman will come every Saturday no matter it rains or not.
放在开始、结尾、中间都是可以的.
When he was a boy,he walked 30 miles to go to school.
The bird flies from the north to the south at the beginning of November.
The postman will come every Saturday no matter it rains or not.