What’s the difference between when, as, and while?

I think choices 1, 2, and 3 are correct. Is there any difference? I saw a boy………I was driving. 1)when     2)as      3)while   4)since Thanks Answer Without further context, there is some ambiguity present with the choice of “when”. To say “I say a boy when I was driving.” may be read as saying that you … Read more

“When” or “Where” when refering to scenario?

In a sentence like, “This bias may not be acceptable in all scenarios, especially where/when recall is important,” which of where/when should be used? Answer In a sentence like, “This bias may not be acceptable in all scenarios, especially where/when recall is important,” which of where/when should be used? Let’s diagram. (partial for the sake … Read more

Comma usage: Sentence starting with “But”, sentential adverb, and followed by “when”

I have a sentence structured as follows in a scientific text. But, in particular, when doing A, the system cannot do B. I think all commas are formally required. However, for “But” in particular, I am always urged to omit the trailing comma, since doing a reading pause feels really awkward. The same holds for … Read more

Using “will” after “when” referring to the future

I’m going to send an email to a professor. There is a sentence that I think may be wrong because I’m not sure about using will after when, even though it obviously refers to the future. But definitely I would love to join to your team and I hope you have an open position when … Read more

Is “when” an adverb in this usage?

‘When did you last see him?’ In the above sentence, is “when” an adverb? If so, what word is it modifying? Answer “When” is an adverb of time, referring to the verb “see” – In other words, modifies it. In your example, it’s an interrogative adverb, meaning “at what time”. AttributionSource : Link , Question … Read more

Can “when verb+ing” refer to an activity in the past?

A correct sentence would be: When they were designing the product, they paid attention to… Is this grammatically correct: When designing the product, attention was paid… Answer Subjectless preposition phrases using gerund-participles have no tense and can be interpreted as referring to present, past or future time. The time being referenced is understood by reference … Read more

finish, is finished, have finished

Could you help me about this question? I am confused about how to use "finish" with "when". For example: When your class is finished, could you wait for me at the bank? When your class finishes, could you wait for me at the bank? When your class has finished, could you wait for me at … Read more