一般過去時的用法 (2)
　　
比較：
一般過去時表示的動作或狀態(tài)都已成為過去，現(xiàn)已不復(fù)存在。
Christine was an invalid all her life.
(含義：她已不在人間。)
Christine has been an invalid all her life.
(含義：她現(xiàn)在還活著)
Mrs. Darby lived in Kentucky for seven years.
(含義：達比太太已不再住在肯塔基州。)
Mrs. Darby has lived in Kentucky for seven years.
( 含義：現(xiàn)在還住在肯塔基州，有可能指剛離去)
注意：用過去時表示現(xiàn)在，表示委婉語氣。
1）動詞want, hope, wonder, think, intend 等。
Did you want anything else?
I wondered if you could help me.
2）情態(tài)動詞 could, would.
Could you lend me your bike?