This is very useful.

Now, why is this useful

And why is this useful?

What is this even useful for?

And this is where it's useful.

And this is actually really useful.

Now, why is this so useful?

So why is this even useful?

And now this is super useful.

This dictionary is as useful as yours.

This dictionary is not useful at all.

That's the mean. Why is this useful?

This is not only useful for stadia.

This should be useful.

Well, this seems useful.

This is the more useful of the two.

This dictionary is as useful as that one.

I think this dictionary is useful for beginners.

This type of math is very very useful.

Sal, when is this multiplication thing even useful?

Is this promoting the progress of useful arts?

Antiperspirant is useful.

This driver is too small and isn't very useful.

This book is much more useful than that one.

This job is only useful with a master document.

This pattern is not just useful, not just beautiful.

This is normally useful when you're writing a test.

This will be useful later.

And it's useful beyond this.

And the reason this is useful, is that this is really easy to multiply.

Speaking English is useful.

Electricity is very useful.

It is very useful.

I don't know if this 4 o'clock is useful yet.

Why is this useful for a class on programming languages?

Why is this useful, or what does it tell us?

This is particularly useful for checking tools before critical operations

Written as it is plain English, this book is useful for beginners.

This is why I think what we've learned so far is useful.

This dictionary isn't useful at all.

You'll find this map very useful.

This dictionary isn't useful at all.

This is a useful book and, what is more, it is not expensive.

This is a useful book and, what is more, it is not expensive.

Salt is a useful substance.