If you do notice, hypnosis script generally uses long sentences. There is a reason to this. It is meant to ‘overcrowd’ our conscious mind so that it gives up and let the subconscious mind takes over.
In event that the sentences used are not long, but you will notice the sentences tend to link one to another smoothly like a flowing stream. This is made so that your mind is kept engaging in it and has little time to notice other things.