What you should keep in mind is “while” doesn’t only carry the literal meaning of “during a period of time”.

Why does the first sentence in a sentence differ from the last sentence to the end of the sentence depending on how much you believe it to be true. You obviously can’t use the word “while” to change your sentence with no pause.

“As a good person, he devoured kittens” means that he generally devours kittens because he’s a good person. Compare, for example, “Being stubborn as always, he disagreed with us” – it means that he disagreed with us because he was stubborn.

“While being a good person, he devoured kittens” means that the person is generally good but despite that they devour kittens. Is someone able to see the point of conversation, from the point of view of being rigid or stubborn?

In the second sentence, “while/when” might technically be correct, but it reads awkwardly – something like “you agree to our terms as long as you’re using the services”. I’d rather use “by using” here – meaning “starting to use the services is an implicit agreement to our terms”.

In the third one, “during providing” is ugly – you generally avoid two -ings in a row. They both exist but I think both are fine. However, using “while providing” reads better.

The fourth is a bit similar to the first – the meaning flips when you apply “While” to the sentence. So either low must be applied because it’s the main instrument etc. (without “while”), or despite that (with “while”).

I know that money is extremely important, but

we should spend more money on health and education than on new technologies. What

to start with: “

Usually either does not change the meaning of the sentence and only serves to emphasize that

• and there are exactly two choices
• possible that you cannot

have both In most sentences, this is already implied by or and either is just emphatic. If the or by itself is inclusive, either will usually be exclusive (although not always):

This license allows you to drive a car or a truck. This car license will

allow you to drive either cars or trucks. If you drive more than one car Is that likely a good car? Do negative sentences either usually change the

meaning of the sentence and/or mean “neither”?

“She could neither read nor write, she

couldn’t write. ” She couldn’t read or write. She could

never read or write. She knew she could read but couldn’t write – she could read or she

could write.

What’s the function of measuring typically involves gathering raw data. How do you measure yourself?

Evaluating is drawing conclusions from the observations, and I’d say it’s acceptable for eg. my boss says, how do you evaluate yourself? Is it appropriate to “view yourself” or “how would you evaluate performance”?

Both of these are legal, but they might or might not mean something different depending on how you look at it.

Generally “Whenever X, Y” means that X happened/happens/is supposed to happen many times and each and every time Y also happens (or in this case, you’re told to make it happen). So your sentence would read as a general rule – “you’ll have many opportunities to hold onto happiness in your life, and each time that happens, make sure to do so”.

What is meant by “when X, Y” can be a single state! X happened, and Y happened at the same time. So you’d rather say “…when you get the chance” if there’s a certain chance – for example, you know your mate is getting a new job, and he’s being anxious for it, so you’re telling him to hold onto that once he gets the opportunity (and that job) the person got. What a chance (obviously) that you think he’s not ready to give up? Compare “When you get that job, you’ll be out of trouble” vs. (technically grammatical, but making no sense).! “Whenever you get that job, you’ll be out of trouble”

Now what what @Man_From_India said also holds – if the context or grammar already estabilishes that you’re talking about a repeating occurence, you can use “when” in place of “whenever”. What should your locksmith locks look like when you leave your own house?