try / skiing
I have (never) tried skiing.
see / lion at the zoo
I have (never) seen a lion at the zoo.
play / guitar
I have (never) played the guitar.
swim / in the sea
I have (never) swum in the sea.
eat / frog's legs
I have (never) eaten frog's legs.
eat / sushi
I have (never) eaten sushi.
play / computer games
I have (never) played computer games.
write / email
I have (never) written an email.
cook / pasta
I have (never) cooked pasta.
fly / on a plane
I have (never) flown on a plane.
fly / helicopter
I have (never) flown in a helicopter.
travel / boat
I have (never) travelled by boat.
see / giraffe in the wild
I have (never) seen a giraffe in the wild.
do / karate
I have (never) done karate.
visit / France
I have (never) visited France.
swim / pool
I have (never) swum in the pool.
climb / mountain
I have (never) climbed a mountain.