He was a party to the conspiracy.
((形式))彼は陰謀に関与していた
He was all in tears.
彼は泣きぬれていた
He was at peace with himself.
彼は安心していた
He was at school with me.
彼は私と同じ学校に通っていた
He was banking on your attending [you to attend] the party.
彼はあなたのパーティー出席をあてこんでいた
He was certain of winning the game [that he would win the game].
彼はきっと試合に勝てると考えていた
He was cheating (with his secretary) (on his wife).
彼は（妻を欺いて）（秘書と）不倫をしていた
He was cheered by the good news.
彼は朗報で元気づいた
He was closeted with his legal adviser.
彼は法律顧問と密談していた
He was complaining about the company's working conditions, and rightly so.
((略式))彼は会社の労働条件に文句を言っていたが，無理もない話だ
