Correct
to be
Make a sentence
Can/ Could/ Can't/Couldn't
100

Lara working in London.

Lara IS working in London.

100

She........... calling her mother.

She is calling her mother.

100

Nick/not/watch TV

Nick isn't watching TV.

100

?Fish......swim.

can

200

They is going to the zoo.

They ARE going to the zoo.

200

They ........... playing a game.

They are playing a game.

200

She/not/play the piano.

She isn't playing the piano. 

200

 He........ ride a bike. He  thinks it's not easy.

can't
300

They waiting for you.

They are waiting for you.

300

Nancy and I ........ getting ready for the party

 Nancy and I are getting ready for the party.

300

I/not/drink coffee.

I am not drinking coffee.

300

 She.......swim when she was 5 years old.(could/ can)

could

400

Carol is prepareing for the test.

Carol is preparing for the test.

400

Kim........ working on the project

Kim is working on the project

400

The children / not / play video games.

The children aren't playing video games.

400

 My grandma........ride a bike now. (can/ could)

can

500

I am fixxing the car right now.

I am FIXING the car right now.

500

THe children..........  playing on the beach.

are

500

It/not/rain.

It isn't raining.

500

 My brother .....talk when he was 1 year old.(couldn't/ can't)

?couldn't
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