weight与weigh
(1)weight是名词，意为“重量,体重,重担”。如：
He has put on weight since I last saw him.
The loss of the money has been a weight on my mind.
(2)weigh是weight的动词形式，意为“称重量，衡量”。如：
I weigh less than I used to.
He weighed the ideas in his mind.
练习：
1. This machine is too heavy. Do you know its ______?
A. weigh        B. weight        C. quality        D. quantity
2. Jimmy, if you don’t do sports every day, it’s hard to ________(减肥).
3. —I think Mary is skinny.
—So she is. She should ______ to keep healthy.
A. lose weight        B. put off weight        C. put on weight    D. put weight on
weigh名词1. B        2. lose weight        3. C

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