Choose the correct words. 1)we use an infinitive with/without to after can and could. 2)the he/she/it form of can iscan/cans. 3)the negative of can is don't can/can't. 4)we use can to talk about the present/past. 5)we use could to talk about the present/past. !
1) we use an infinitive WITHOUT to after can and could.
2) The he/she/it form of can is can.
3) The negative of can is can't.
4) We use can to talk about the present.
5) We use could to talk about the past.