Fill the gaps with can, can't, could or couldn't:
(Rellena los huecos con can, can't, could o couldn't)
1. Tom missed the bus because he run fast enough.
2. Andrew is a terrible dancer. He dance well.
3. They climb the mountain. It was too dangerous!
4. I don't know how to do this. you help me?
5. When he was younger he run very fast.
Ver explicación verbos modales en inglés