Can - could - will be able to

In 15 years time, human beings ____________________ live on the moon.

I ___________________ play the piano when I was 4.

I ___________________ play the piano when I was 4.

Now most people ________________ have access to education

Mark wanted to see the final of the European Cup, but he _______________ get tickets.

Jeronimo _____________ play the violin very well now, but with practice and effort, he ___________________ improve a lot

A long time ago, women _________________ go to university because they didn't have the right to do so

At the moment, we ___________________ communicate with aliens but in the future, we _____________________ to do so.

In the future we _________________ use robots to do the housework.