5. he collected a lot of materials

john takes his dog out in the morning

his- это (его) всмысле чей

him- в смысе его самого

can i play with you?

yes, of courыe,you can play with me.

should we do it?

yes, we should do it.

must we translate this text?

yes, we must translate this text.

may she take his pen?

  yes, she may take his pen.