japanese help?

食べることができますか？ Can you (or whoever) eat it? taberukoto ga deki masuka?

Anata nimo onaji youna kotoga dekimasu ka?
can you do as much?

eigo no jishyo nashite sumiseru kotoga dekimasu ka?
Can you do without an english dictionary?

Anata wa uma ni noru kotoga dekimasu ka?
can you ride a horse?

Kare wa eigo wo wasu kotoga dekimasu ka?
can he speak english?

well you already have a good answer but i wanted to add that instead of using that annoying form it is easier and more common to hear "eru" or "rareru" at the end of verbs to give that same meaning.

hanasu - hanaseru - hanasemasu I can speak

taberu - taberareru - taberaremasu I can eat

A lot of times that extra "ra" though is omitted from casual speech

It is so much easier too....

That exercise is just to get used to changing verbs into nouns in Japanese.

There is another form "koto ga aru" that describes experiance and has that same concept.

isnt this romanji becuase jap would be using the symbols?