* The end of the wires are soldered for fear that they should fray during vibration.

線頭要焊牢，以免震動(dòng)時(shí)松動(dòng)。

5. should + have +過(guò)去分詞句型

should + have +過(guò)去分詞結(jié)構(gòu)用于表示過(guò)去的事情，如果是肯定句，說(shuō)明某件事應(yīng)完成而未完成；如果是否定句，表示發(fā)生了不應(yīng)該發(fā)生的事情?？隙ň淇勺g為“本應(yīng)該”、“本該”，而否定句可譯為“本不該”等。有時(shí)，這種用法也被當(dāng)作虛擬語(yǔ)氣的ー種。如：

* The dynamite itself should have been implanted in a matrix of inert materials.

炸藥本應(yīng)該被灌注在ー種惰性物質(zhì)的填料內(nèi)。

* The machine should not have been so bulky.

這臺(tái)機(jī)器本不該這么笨重。

* Its contact fatigue life should have been comparable to steel.

它的接觸疲勞壽命本應(yīng)該比得上鋼質(zhì)的。

責(zé)任編輯：admin