This is the most beautiful sight that I have ever seen.
He failed in his attempt to swim the river.
Don't trust a man whose past you know nothing about.
We used to go skating every weekend.
It is illegal for bicycles to pass on the right of cars.
Danger past, God forgotten.
We spent happy days there all the summer.
I have neither seen nor heard of such a thing.
The teacher cannot have said such a thing.
The price of cabbage fell because of overproduction.
The friend who I thought would pass the exam failed it.
The average height of the girls in class is over 155 centimeters.
This is the most massive structure I have ever seen.
I had never seen a windmill until I visited the Netherlands.
By the way, have you seen him lately?
This is the tallest man I've ever seen.