1. seen
I've seen it.
Seen from a distance, she's a beauty.
As far as the eye could see, nothing could be seen except cornfields.
Was she seen?
Since she got her braces, I've hardly seen her smile.
The train he was on could no longer be seen.
Oh, come on! You gotta at least spend the night. We haven't seen you for so long.
You'd be amazed how often I've seen Tom and Mary hanging out together.
Can these stars be seen in Australia?
No sooner had the child seen his mother than he burst into tears.
Part of the charm of a big city lies in the variety of styles that can be seen in the architecture of its buildings.
Tom found it fairly easy to follow Mary without being seen.
Tom had a new scar on his forehead since the last time Mary had seen him.
Coca-Cola advertisements can be seen all over the world.
This national treasure can be seen by the public only once a year.
2. saw
I saw nothing.
The year 1980 saw the fastest economic growth in that country.
The man I saw yesterday was a complete gentleman.
It's been two years since I saw him last.
I would scream very loudly if I saw a scorpion in my room.
Tom and Mary were paddling a canoe down the river the last time I saw them.
Today, my classmate saw you guys shopping at Auchan.
She denied having met him even though we saw them talking to each other.
Each of them has to write a report about what he saw.
I saw some small animals running away in all directions.
What would you do if you saw a man from another planet?
He saw brightly-colored birds, flowers and leaves.
Suppose your father saw us together, what would he say?
Both men drew maps and pictures of what they saw.
The boy I saw searching through the garbage can said that he had not eaten anything for four days.