I/ swim last summer (+)
I swam last summer.
You/ sing at the party (+)
You sang at the party.
he/ shrink my T-shirt (+)
He shrank my T-shirt
he/ begin studying one hour ago. (+)
He began studying one hour ago.
The ship/ sink in the ocean. (-)
The ship didn't sink in the ocean.
we/ run in the park yesterday. (+)
We ran in the park yesterday.
they/ drink soda. (+)
They drank soda.
I/ ring the doorbell. (+)
I rang the doorbell.
The boat/ sink in the lake. (+)
The boat sank in the lake.