This farmer/ work/ on the field.
This farmer has worked on the field.
We/ not read/ newspapers.
We haven't read newspapers.
We/ play/ soccer / on the ground.
We've played soccer on the ground.
He/ make/ sandcastle.
He has made a sandcastle.
She/ not write/ a letter.
She hasn't written a letter.
We/ eat/ pizza.
We have eaten a big pizza.
They/ watch/ a movie.
They have watched a movie.
We/ not learn/ French language.
We haven't learned French language.
They/ work/ on a project.
They've worked on a project.
Our neighbor/ go/ to Canada.
Our neighbor has gone to Canada.
My friends and I/ not swim/ in the pool.
My friends and I haven't swum in the pool.
She/ not be/ to London
She hasn't been to London.
I / not / be/ aquarium.
I haven't been to an aquarium.
Jane/ buy/ a new car.
Jane has bought a new car.
Thomas/ break/ his leg.
Thomas has broken his leg.