过
guò
(verb suffix: experience)
After a verb, you have done it at some time before: 我去过北京 'I've been to Beijing'.
In a story
方兰问过:“为什么这么便宜?”Fang Lan had asked, "Why is it so cheap?"楼上的洗衣机 · The Washing Machine Upstairs · HSK 2
Grammar with 过
过
过 — experienced before
通过
通过 — through / by means of
⋯⋯固然⋯⋯,但是/可是/不过⋯⋯
⋯⋯固然⋯⋯,但是⋯⋯ — admittedly …, but …
虽说⋯⋯,但是/可是/不过⋯⋯
虽说⋯⋯,但是⋯⋯ — although (colloquial)

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