Japanese

We can turn a verb into a noun by adding the nominalizer particle の after the plain form of the verb. We can then use the verb in constructions where we normally would use a noun.

One thing this allows us to do, is to express that we are good at or bad at a certain activity. To say that we're good at something, we simply use a verb in the plain form + のが上じょう手ず. Similarly, if you don’t like something, you can use plain form + のが下へ手た.

We already knew how to say he is good at Japanese. Now we're also able to say he is good at speaking Japanese.

He is good at Japanese.	彼かれ　は　日に本ほん語ご　が　上じょう手ず　です。 kare ha nihongo ga zyouzu desu.
He is good at speaking Japanese.	彼かれ　は　日に本ほん語ご　を　話はなすの　が　上じょう手ず　です。 kare ha nihongo wo hanasuno ga zyouzu desu.

(I)'m not very good at eating with chopsticks.	箸はし　で　食たべるの　が　余あまり　上じょう手ず　じゃ　ない。 hasi de taberuno ga amari zyouzu zya nai.
(I) am bad at playing the guitar.	ギター　を　弾ひくの　が　下へ手た　です。 gitaa wo hikuno ga heta desu.