Present Simple or Continuous? I don't can or I can't? He is or he are?

Present simple vs continuous (progressive) tense

There is a lot of garbage, and robots need to clean it. Two robots want to leave the junkyard and go to the beautiful city across the river. Finally, they decide to build a raft and leave this place, but they are afraid they might get caught. They build this raft and want to leave, but a security robot catches them and tries to fight them. The small robot leaves the junkyard, but the big robot helps his friend to leave and drowns. 

Mechanical at the Junkyard - Short Film

mechanical-at-the-junkyard-short-film

Let's do English ESL general grammar practice. Present Simple or Continuous? I don't can or I can't? He is or he are?