彼は一生懸命働いた、そうでなかったら失敗しただろう。の英語

He worked hard. Otherwise he would have failed.

He studied hard; otherwise he would have failed again.

He tried hard, but he failed.

He tried hard, but failed.

He tried hard but failed.

He'll fail, unless he tries harder.

He studied hard for fear he should fail.

He studied hard so he wouldn't fail.

He felt his failure too deeply and left his job.

He failed due to lack of effort.

He worked hard for fear that he should fail.

He worked hard for fear (that) he should fail.

He couldn't make it in business.

He attributed his failure to bad luck.

He takes his failure seriously （to heart）.

He worked hard only to fail.

It is no wonder that he failed.

he was certain to fail

It is no wonder that he has failed.

He failed in spite of his great efforts.

It is no wonder that he failed.

I was astonished to hear that he failed.

I was surprised that he had failed.

he felt that his entire life had been a failure

He steeled himself against possible failure.

It is a great pity―deeply to be regretted―that he has failed.

His failure was due to his idleness.

The reason he failed was because he neglected his work.

He did his best only to fail again.

I was surprised that he had failed.