spend for vt.花钱买
I can't spend so much money for/on it.
spend doing 可以是"花时间做......"也可以是"花时间买......"
I spend too much time in playing computer games.
My sister spends too much money in buying clothes.
1.spend for
for 后跟目的,如: I spent five dollars for the ticket.
2. spend doint
通常是spend some time/money (in) doing sth,如:
I spent an hour reading.
3. 另外还有spend...on sth, 如:
He doesn't spend much time on his homework.
= He doesn't spend much time (in) doing his homework.