One of the trickier points of Chinese grammar is how to use 通过 (tōngguò) and 经过 (jīngguò) correctly. Though they have very similar meanings, they have somewhat different uses.
通过 as a Verb
The first way that 通过 is used as a verb is that it means going through a certain object, as in penetrating into and coming out of something. In this case, it is similar to the word 穿过.
Subject + 通过 + Object
To get here from my house, I have to cross two bridges.
Go straight ahead, go through a red door, turn left, and you'll see it.
The second way that 通过 is used as a verb is that it means that something goes through effort in order to reach acknowledgement or agreement. This is similar to how we say "meet someone through a friend".
Subject + 通过 + Object
New York University went through my application.
I went through this test.
This project went through the board of directors.
通过 as a Preposition
As a preposition, 通过 expresses using a certain method to achieve a desired outcome. It emphasizes the manner or method of doing something, and it can be placed before and after the subject.
通过 + Method, Subject + Predicate
Subject + 通过 + Method + Predicate
Through our research, we've discovered that soybeans are good for the body.
The company lay-off method helped solve its finance problem.
We found him via his friends.
经过 as Verb
The first way that 经过 is used as a verb is that it means "to pass by" or "to pass through".
"经过"作为动词时，意思是"to pass by"或"to pass through"。
Subject + 经过 + Place
I go past this little store every day.
When we go to the airport, do we pass the People's Square Station?
The second way that 经过 is used as a verb is that it means "to experience something" or "going through a time". It emphasizes the process of that experience. When expressing "to experience something", it often has a negative connotation. If it is talking about "going through a time", it is usually talking about the past.
"经过"作为动词的第二层意思是"to experience something"或"going through a time"，它强调的是经历的过程。当表示"to experience something"，它通常带有消极含义，而当说到"going through a time"，一般它涉及的是过去的事。
经过 + Event/Time, Subject + Predicate
After going through a month of training, our staff has prepared well.
After going through a detailed explanation, I finally understood the problem.
经过 as Noun
As a noun, 经过 refers to the process of something.
Adjective + 经过
Please tell us a little about that process.
No one knows the actual course of events.
Translated from: allsetlearning
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