尽可以 + 动词
can by all means; are quite free to; feel free to
Structure
主语 尽可以 动词短语 （， 可／但 限制） · （口语） 尽管 动词
What it means
Tells someone they may do something as freely as they like: “by all means, feel free to”. 尽 (jǐn, as in 尽量) means “to the full, without holding back”.
How it is built
Subject + 尽可以 + verb phrase (+ 可／但 + limit): 你尽可以不信，可事实就是这样 (You are welcome not to believe it, but those are the facts).
When to use it
Writers often grant the freedom, then limit it with 可 or 但. In speech the adverb 尽管 does the same: 有问题尽管问. Keep it apart from the conjunction 尽管…还是… (although).
Watch out
It comes after the subject (✗尽可以你问 ✓你尽可以问), and it grants permission, not ability: for “is able to” use 能.
Examples
买车的时候，你尽可以比较外形和价位，慢慢挑一辆喜欢的。
When you buy a car you are quite free to compare looks and prices and take your time choosing one you like.
有什么不清楚的，尽可以问教练，不用不好意思。
If anything is unclear, feel free to ask the instructor; there is no need to be shy.
你尽可以不信，可事实就是这样。
You are welcome not to believe it, but those are the facts.
Learn this in Lesson 141 · HSK 7–9: 考驾照，抢车牌 (Driving tests and number plates)
A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. The first lessons of every level are free.
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