Complete as frases com COULD ou Couldn’t.

a) When I was young, I ……………... play the guitar. It was too difficult for me!

b) Her grandmother was bilingual. She …………………. speak both English and Spanish.

c) Yesterday, Peter …………………. do that exercise alone. So, he called me for help.

d) In 1950, people …………………. use mobile phones.

e) When his mother was young, she ………………….skate but she can't do it any longer.​