It's difficult to tell how much charge is left in the case.

You can never tell how long the wait will be, he said.

Time will tell how stable, reliable and efficient that government will be.

It seemed he'd be able to, though he couldn't tell how far.

But I couldn't tell how far or how fast we were going.

It was hard to tell how long the animals had been dead.

Without a telescope, you can't tell how far away the stars are.

Now I perceived it; I can scarcely tell how it startled me.

Otherwise, he said, it is hard to tell how effective they were.

I can't tell how, but their story was made known to me.

It was impossible to tell how deep below it the floor was.

Now to tell how it began, but allow me one more preface.

It was impossible to tell how sincere he was over the phone.

It was hard to tell how much Tanya could sense of that.

And unlike you, I can't tell how badly injured I might be.

She can obviously tell how thirsty he must be, bless her heart!