Question

11.- ___you speak Russian when you went to the university in Moscow or did you learn later?*
○can
○could
○couldn't

12.- Both my sisters____dance ballet really well. I think they'll be famous!
○could
○can
O couldn't

13.-____speak english? *
○Can you
○You can
○Can not

14.-She____climb that tree. *
O can
Ocans
○is can

15.-I_____carry these bags. Please
you help me?
O can't/ can't
O can/can't
○Can't​

Answer 1

11- couldn’t
12- can
13- can you
14- can
15- can’t

Answer 2

Respuesta:

11. Could

12. can

13. Can you

14. can

15. can't / Can

Explicación:

Modales Can - Could. podemos decir que la diferencia entre can y could es que can es utilizado para mencionar posibilidad y habilidad de algo en el presente, mientras could es la forma pasada de can y además es su condicional en el presente y futuro. La estructura es la siguiente:

Sujeto + Can o Could + Verbo en forma base + Complemento.