出国留学网英语栏目为大家带来“攻克英语写作要掌握的七类经典句型”，希望对大家有所帮助! 1.表示原因 1)There are three reasons for this. 2)The reasons for this are as follows. 3)The reason for this is obvious. 4)The reason for this is not far to seek. 5)The reason for this is that... 6)We hav...