他每周花多少时间练习游泳用英语说

二楼的。。 你用many 那time不就变成次数了吗

how much time does he spend practising swimming every week

how much time does it take him to practise swimming every week

How much time does he spend (in) practising swimming every week?

how many times does he spend on swimming once a week?

time 不能用much 和 cost 吧？

how much time does he spend on swimmming every week?

how much time does he spend practising swimming every week

how much time does he cost on practice swimming once a week