He watches TV half an hour every day. He spends half an hour (in) watching TV every day. He spends half an hour on TV. It takes him half an hour every day to watch TV.
He watches TV half an hour every day. He spends half an hour (in) watching TV every day. He spends half an hour on TV. It takes him half an hour every day to watch TV
He watches TV for three hours and a half every day I spend three hours and a half watching TV every day It takes three hours and a half for me to watch TV every day