past participle

Babylon is fallen

Tower of Babel in Babylon

Tower of Babel

♪♩♫ Joy to the world 
The Lord is come… ♫♩♪

Wait, wait. The Lord is come? Isn’t there something wrong? First, we know that come cannot be in the passive voice here, as come is an intransitive verb, it does not have an object, which basically means it cannot have a passive form. On the other hand, if it was in the present perfect tense, then the auxiliary used should have been “have” (has) instead of “be” (is). What is happening?

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A natural centrifuge in English

A centrifuge is a machine that makes use of the centrifugal force to separate the different substances in a mixture. After the process, the lighter substances float on the top, whereas the heavier substances sink to the bottom. Surprisingly, a similar process also happens in English.

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