请问add to ,add up to ,add by ,add up 这四个短语的用法及区别谢谢

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请问add to ,add up to ,add by ,add up 这四个短语的用法及区别谢谢
请问add to ,add up to ,add by ,add up 这四个短语的用法及区别谢谢

请问add to ,add up to ,add by ,add up 这四个短语的用法及区别谢谢
add to :增加;增进
increase
· That will only add to our difficulties.
那只会增加我们的困难.
· I don't want to add to your troubles.
我不想给你增加麻烦.
add up to :总数为;总计为;意味着;总而言之
amount to; mean; signify
· The figures add up to 137.
这些数目加起来总和是一百三十七.
· He made a number of criticisms,but they didn't add up to much.
他提了一些批评意见,但这些意见没有多大价值.
add up:总计
find the total of
· Add up 6,7 and 8 and you'll get 21.
把六、七、八相加,总数是二十一.