by with and in区别
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WITH/BY/IN的用法区别:"The mountain is covered with/in/by snow". The meanings are so similar that the three can be used almost interchangeably, but some subtle nuances may apply. When referring to a substance(物体) that sticks to another, use in or with, but not by: •The actress was covered in blood, or
•The actress was covered with blood, but not
•The actress was covered by blood.
When referring something that physically protects something else, use with or by, but not in:
•The field(田地) was covered with a tarp(油布), or
•The field was covered by a tarp, but not
•The field was covered in a tarp.
Use covered with to indicate an unusual amount of something on top of something else; use covered by to connote a covering so dense that the object being covered is completely obscured from view:
•The mountain was covered with fog.
•The mountain was covered by fog.
Another example:
•Our grass(草坪) was covered with butterflies.
•Our grass was covered by butterflies.
Somehow, the latter (covered by) paints a picture where the butterflies are so close together that I can hardly see the grass at all, but in the former (covered with), I picture a lot of butterflies, just not necessarily so many that I can't see the grass.
When talking about metaphorical coverage, use covered by:
•The roof damage was covered by insurance(上保险), but not
•The roof damage was covered with insurance, or
•The roof damage was covered in insurance.
Another example:
•The city council meeting was covered by the news station, but not
•The city council meeting was covered with the news station, or
•The city council meeting was covered in the news station.。