$8.$ $...$
$→$ Do you enjoy playing football?
$→$ Are you interested in playing football?
$-$ enjoy + V-ing: thích làm gì.
$-$ to be interested in Noun/ V-ing: có hứng thú với việc gì.
$9.$ I spend half an hour doing my homework yesterday.
$-$ S + spend (s) + time + V-ing: Ai đó mất bao lâu để làm gì.
$10.$ It took me half an hour to wash all these clothes.
$-$ It takes someone + time + to V $=$ S + spend (s) + time + V-ing: Ai đó mất bao lâu để làm gì.