Question

チェリー🍒

The president has just arrived at the airport.

When I (arrive) at school,the class (already start).

It (stop) raining by this time tomorrow.

Kate (watch) TV since she came home from school.

と問題で出てきたときにどれが現在完了形か過去完了形か未来完了形か現在完了進行形か分かりません。
分かる方法はありますか？