A guitar

Yes.

Vincent TeoCan I say, He likes playing a guitqar. He is playing a guitar.

Also common: He likes playing the guitar (in general).

I have no doubts about your pieces of advice, but my whole life I've been taught not to use an article in "play + instrument".

E.g.:

"I've been learning to play guitar for five years."

"I play guitar every day."

"I'm playing piano right now."

Etc.

The only case where I'd use an article would be if I wanted to refer to a particular, tangible ins

I've found the difference between 'the' and without an article on the Internet. But what about the "play a guitar" form?

The only thing I've found on the Internet about it was that it's strange and no one would use it.

He likes to play a guitar. (Has a sense that he owns the instrument, and he likes to play it.)

He likes to play the guitar. (Has a sense that he prefers this type of instrument to other types.)

I'm getting confused. Which is correct?

...playing a / the guitar.

Both are correct.

These are some good sentences:

He plays a guitar to serenade his love.

He likes to play the guitar. When he was younger, he liked to play the piano.

Playing guitar is his favorite pasttime.

Thank you, but what's wrong with "Playing the guitar is his favourite pastime."? Why is that wrong and should be used without "the"?

Thank you in advance.

Hi; There's nothing wrong with your version. I was simply giving a sampling of possible expressions (with the definite, indefinite and no article) to Vincent because he was confused.

It was not an exhaustive list