be to do 结构含义：
1. should
Eg: Such a private thing should be avoided.
Such a private thing is to be avoided
2. must
Eg: No students must leave school without the permission of the police.
No students are to leave school without the permission of the police.
3. intend 意图，打算
Eg: We intend to start work next week.
We are to start work next week.
4.Both the police and the workmen were grateful to the student for this piece of advance information.
背诵句型
were grateful to sb for sth 因...而感激/感谢
Ex
His parents were very grateful to us for informing them of his safe return.
5.When he received a very rude reply from one of the workmen, he threatened to remove them by force.
背诵句型
threatened to 恐吓要做某事
by force 以武力
发表于 2016-7-11 23:01:46