9. It is already 12:30 now，but dad hasn，t come back. He          the traffic jam on his way home. (catch)

已經(jīng)12點(diǎn)半了，爸爸還沒(méi)有回。他一定是在回家的路上遇到了交通堵塞。

9. must have been / got caught in考查情態(tài)動(dòng)詞表推測(cè)的用法。本題為對(duì)已經(jīng)發(fā)生的事情進(jìn)行推測(cè)，因此用must have done。表示對(duì)當(dāng)前行為、情況或;1夫態(tài)的4隹測(cè)，用must / may / might / could + do / be句型;表示對(duì)此時(shí)此刻正在進(jìn)行的動(dòng)作的推測(cè)，用must / may / might / could + be doing句型;表示對(duì)過(guò)去發(fā)生的事情的推測(cè)，用must / may / might / could + have done / been 句型。否定句中用can / could not(想必不會(huì)，不可能) 或may / might not(可能不) 表示否定推測(cè)。疑問(wèn)句中用can / could...?表示"……可能嗎？會(huì)是……嗎？"。

題目來(lái)源：高考丟分題英語(yǔ) > Unit 2 Robots

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