"S + wish + S + Verb 2" is it correct? why verb 2? what's the type of sentence? thank you!♡

"I wish John wrote more often" or "I wish John would (past tense) write more often" would both meet your requirement. They express hypothetical/wish situations, i.e., the subjunctive mood.
You can learn more about the subjunctive mood here: http://bit.ly/2Me7saM
Or here (if you prefer watching videos): https://youtu.be/-vefS0B1DIY

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