95 Honda civic, just started to put and engine would shake every time I accelerate and when AC is on?

Yesterday my car drove perfect then today I started it and just when I got on the road it started to shake so I turned off the AC. Then it ran better but once I give it gas it starts to shake again, but if I m not in gear I can rev it up and there is no shaking just sounds like it runs great. Anyone know what could be causing this problem?

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