A sentence to say in one sentence is to say a sentence in one sentence! It is quite easy to say a sentence in one sentence if that is all you have to say. "The cat with brown hair, hair of brown has...
Yes We have had a good summer this year. We have had a nice time
The subject is the one that tells who is the sentence talking about, respectively.
Every one wants to experiment death
Sorry, but there is no such thing.