If we have to litigate, we will.(如果我們必須提起訴訟的話，我們會的。)

He's useless—he'll have to go.(他毫無用處—得辭掉他。)

You'll have to travel in disguise.(你將不得不喬裝出行。)

Sorry, I really have to bail.(對不起，我真得趕緊走了。)

Hotel inspectors have to travel incognito.(酒店檢查員巡查時必須隱瞞真實身份。)

I have to stay in on weeknights.(除了星期六和星期日外我每天晚上都得待在家里。)

I have to make a phone call.(我得打個電話。)

They may have to amputate.(他們可能不得不施行截肢手術。)

I'll have to leave after this hand.(這一盤打完后我必須走了。)

I have to finish this essay today. We have to hand them in tomorrow.(我今天得完成這篇論文，因為我們明天必須交。)