$1$ I don't want to go out tonight as I'm studying for a test at the moment.
Объяснение: $do{n}^{\prime }twant$ — Present Simple (статив), $amstudying$ — Present Continuous (сейчас).
$2$ My brother plays football every Sunday but this Sunday he is going camping.
Объяснение: $plays$ — Present Simple (привычка), $isgoing$ — Present Continuous (план на ближайшее будущее).
$3$ Rose is talking to that French tourist at the moment. She speaks French well.
Объяснение: $istalking$ — Present Continuous (сейчас), $speaks$ — Present Simple (умение/постоянное качество).
$4$ Tom is watching a film on television now. He doesn't often do this.
Объяснение: $iswatching$ — Present Continuous (сейчас), $does{n}^{\prime }toftendo$ — Present Simple (отрицание с частотным наречием).