Present perfect or past simple? steven(come)home yet 1)aren't coming 2)didn't come 3)hasn't come i (see) tim for a week 1)didn't see 2)haven't seen

1. Steven hasn't come home yet. (Present perfect, из-за слова YET)
2. I haven't seen Tom for a week (present perfect. со словами FOR SINCE perfect времена употребляютя)