Tom mastered French studying by himself.とは 意味・読み方・使い方

Tom mastered French studying by himself.

Tom learned French perfectly studying by himself.

Tom decided to study French.

Tom studied French.

Tom wanted to learn French.

Tom said he wanted to study French.

Tom enjoys studying French.

Tom must've studied French.

Tom is already studying French.

Tom loved studying French.

Tom learned French.

Tom signed up for a French course.

Tom studies French, too.

Tom continued to study French for another three years.

Tom is studying French now.

Tom is learning French.

Tom majored in French.

Tom has also studied French for several years.

Tom really wants to study French.

Tom is teaching French to Mary.

Tom studies French every morning.

Tom has been studying French for the last three years.

Tom has been learning French for three years.

I wonder if Tom is really studying French.

Tom studied French for many years.

Tom wants to learn French.

Tom didn't study French yesterday.

Tom is probably still studying French.

Tom is bad at French.

Tom isn't good at French.