Hi, I think #1 is ok. After "let", you can use a bare infinitive: Let me go. Let them try to get what they want.
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KooyeenHi,
I think #1 is ok. After "let", you can use a bare infinitive: I think #2 and #3 are not used.
New2grammarI agree that #1 is correct. But #3 could be acceptable.#3 is incorrect. It is not acceptable.