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现在完成时中since和for的区分
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We've got some food to eat for tomorrow already.
我们已经有明天吃的食物了。
Since we've got plenty food in the fridge, you don't have to worry about us for tomorrow.
你不用替我们担心明天,因为我们有很多食物在冰箱里。
我们已经有明天吃的食物了。
Since we've got plenty food in the fridge, you don't have to worry about us for tomorrow.
你不用替我们担心明天,因为我们有很多食物在冰箱里。
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since
+
[过去的]年分
/
月分
/
季节
since
2014
;
since
last
month;
since
february
/
since
this
spring
/
since
last
summer
/
since
the
80's
for
+ 时间/
年
/
月
/
日
for
three
hours
;
for
five
years
;
for
two
months
;
for
four
days
;
for
many
years
+
[过去的]年分
/
月分
/
季节
since
2014
;
since
last
month;
since
february
/
since
this
spring
/
since
last
summer
/
since
the
80's
for
+ 时间/
年
/
月
/
日
for
three
hours
;
for
five
years
;
for
two
months
;
for
four
days
;
for
many
years
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for加时间段
since加时间点
I've been a student for 10 years/since 10 years ago
since加时间点
I've been a student for 10 years/since 10 years ago
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