Level A2
Could: past ability and polite requests
Could is the past of can: My grandpa could run very fast. Could can also be used to ask politely.
My grandpa could run very fast.
Grandpa was young then, and that is the past, so: My grandpa could run very fast.
Forms
can → could— the past of canI / he / they could swim— the same with I, you, he, she, we, they; the action word stays as it isHe could not swim. · couldn't— not after could
A common mistake
Wrong: Last year I can swim.
Right: Last year I could swim.
Last year is the past, so not can but could: Last year I could swim.
More examples
He could not come to the party.
Could not: he was not able to come.
Could you help me, please?
Could can also be used to ask politely: Could you help me, please?