【例1】 John is now with his parents in New York; it is three years since he was a high school teacher in Washington.
【例2】 She didn't attend the meeting because she wanted to.
【例3】As a place to live, it left much to be desired. As a secret training base for a new plane, it was an excellent site, its remoteness effectively masking its activity.
【例4】The teacher didn't tell her students that in so many words, but obviously something about her attitude convinced them.
【例5】If I am getting a free ride, how come I am so tired when I go home at the end of a shift?
【例6】 I am sorry I was a little short with you just now. I don't feel myself today.