Quote:
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Originally Posted by frequency
Yes...it'd better if I write it as
Output voltage becomes x3 of the voltage applied to the terminal by controlling.
But I want to say "output voltage is controlled" first. What will it be?
Sorry for bothering you by my request 
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Okay, you have "Output voltage becomes (three times) the voltage applied to the terminal by controlling (it)," and you want to rearrange the elements of the sentence in order that it start with "Output voltage is controlled." All right, written your way, we would get something like the following: "Output voltage is controlled, whereupon it becomes three times the voltage applied to it." While this is the construction you sought, I must admit that it is syntactically poor, and perhaps grammatically incorrect. Look, if you want to passively put the intransitive verb at the beginning of the sentence, you had better start the sentence with the conjunction "when," which in this instance would function to "indicate a time frame during which something takes place, or an instant, action, or occurrence when something begins or is done" ( Merriam-Webster's 11th Collegiate Dictionary). Thus we would have, "When output voltage is controlled, it becomes three times the voltage applied to it." You're probably thinking that the "whereupon" I lifted from the preceding sentence had already served this function; if you are you're right. However, when you start the sentence
in the passive without the fuction word for time and occurence (when, on, upon, etc.), you leave the reader anticipating a preposition followed by a subject, which you can't do in this case since the verb "control" is intransitive. In close, you should use one of the following three sentences, none of which deviates very much from that for which you're shooting:
(1) Output voltage becomes three times the voltage applied to the terminal by controlling it.
(2) When output voltage is controlled, it becomes three times the voltage applied to it.
(3) When you control output voltage, it becomes three times the voltage applied to it.
Regards,
John
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