he ought to |hand in| his term paper yesterday that is what he could have done

熱心網(wǎng)友

"hand in "應(yīng)改為“have handed in"ought to/should 后面跟不定式的完成式（have done）表示過去本來應(yīng)該做而實際卻沒有做的動作。例如；I should have come to attend your birthhday party last night, but I was too busy.ought to/should 后面跟不定式的完成式否定形式（not have done）表示過去本來不應(yīng)該做而實際卻做的動作。例如：You should not have told a lie to her just now.

熱心網(wǎng)友

"hand in "應(yīng)改為“have handed in"表示“本來應(yīng)做，但未做”。