被動(dòng)語態(tài)的主語是接受動(dòng)作。??側(cè)重說明主語接受動(dòng)作，無須或者無法知道動(dòng)作的執(zhí)行者是誰。比如：Letters are collected from this mail box at7:30 a.m.上午7:30從這個(gè)信箱收取信件。

情態(tài)動(dòng)詞的被動(dòng)語態(tài)

情、助、有、是妥安排，一律隨新主語變。

帶情態(tài)動(dòng)詞和助動(dòng)詞等的被動(dòng)態(tài)如何處理比較復(fù)雜。要隨新的主語來變化，這些詞如“can, could; will, would; shall, should; may, might; must; ought to; need（需要）;have to（不得不）;be going to; to be to; used to; seem to; happen to等。例如：

主動(dòng)：We must keep this inmind.

被動(dòng)：This must be kept inmind.

我們必須把這個(gè)記在心里。

主動(dòng)：We can put the refrigerator in that place.

被動(dòng)：The refrigerator can be put in that place.

我們可以把電冰箱放在那個(gè)地方。

主動(dòng)：We shall not use the washing machine again.

被動(dòng)：The washing machine will not be used again.

我們不能再用那臺(tái)洗衣機(jī)了。 原來的謂語“shall use”被動(dòng)態(tài)中隨新主語變?yōu)椤皐ill”。

主動(dòng)：We shall take more measures to prevent corrosion.

被動(dòng)：More measures will be taken to prevent corrosion. （“shall”變“will”）

我們將采取更多的措施來防止腐蝕。

I ought to be criticized for it. 我應(yīng)該為此受到批評(píng)。

All this has to be solved with great care. 這一切得認(rèn)真解決。

The lobby is going to be rebuilt. 門廳將被重建。

The exhibition is to be opened tomorrow. 展覽會(huì)將在明日開放。