受験勉強は自分自身との戦いであり孤独な戦いだの英語

I can work as hard as anybody

I can work as hard as any

Sometimes it was tough for me to practice all by myself.

I'm behind and exams are coming up.

I have to study more in order to take the examination.

He is intent on his studies.

However hard one may work,―Work as hard as one will,―one can not learn it in a day.

I too will devote myself to studying so that I will not lose to anyone.

For one thing, he works hard.

This exercise is easy enough for me to do without help.

I have to study for my entrance exams from now on.

I must do my best with my study for entrance exams from now on.

I notice the joy of studying seriously.

He neglects his studies, and plays all the time

It is a matter of course that a hard-working man should succeed and an idle man fail.

It's a waste of time to study when you're sleepy.

Effort is essential to studying.

intense in one's studies

The examination was much more difficult than I had expected.

He is too intent on his studies to think of anything else.

Diligence is everything

I have to do a genuinely study for the entrance exam.

Overwork will impair your health

He has risen （in the world） by dint of industry―（他動詞構文にすれば）―Simple industry has raised him in the world.

Play must give place to work.

My labors are fruitless of results―I have laboured without success―in vain―to no purpose.

He is only interested in having fun and neglects his studies.

I studied the textbook only from p. 20 to p. 30 on the chance that the examination questions would be set from that section [thinking that that was the part from which the exam questions were most likely to be selected].

He has, at least, the merit of diligence

You will work yourself to death.