in order to support his family
彼は家族を養うために懸命に働いている。
He works hard to support his family.
彼は、家族を養うために一生懸命に働いた。
He worked hard to support his family.
彼は家族を養うために一生懸命働かなくてはいけない。
He has to work hard to support his family.
彼は新しい場所で家族を養うために熱心に働いた。
He worked hard to support his family in a new place.