可以有很多的说法，包括：
Sometimes I play basketball for half an hour.
Sometimes I spend half an hour in playing basketball.
Sometimes I spend half an hour to playing basketball.
I sometimes play basketball for half an hour.
I sometimes play basketball half an hour.
Sometimes I play basketball half an hour
sometimes I play basketball for half an hour!~
sometimes I play basketball for half an hour
Sometimes I spend half an hour in playing basketball.
I sometimes play basketball for a half hour.
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