Question

14．Tom上周末至多花半小时练习打棒球吗？
Did Tom spend at most half an hour practicing playing baseball？

Answer 1

分析 Did Tom spend at most half an hour practicing playing baseball？

解答 答案：Did Tom spend at most half an hour practicing playing baseball？表达的是过去的动作故用一般过去时，这里是一般疑问句，花时间做某事spend+时间+doing sth，借助于did构成一般疑问，at most half an hour 至多半小时，practice doing sth连词做某事，故答案是Did Tom spend at most half an hour practicing playing baseball？

点评 spend的主语必须是人，常用于以下结构：

（1）spend time/money on sth．在…上花费时间（金钱）．
例：I spent two hours on this maths problem．
这道数学题花了我两个小时．
（2）spend time/money （in） doing sth．花费时间（金钱）做某事．
例：They spent two years （in） building this bridge．
造这座桥花了他们两年时间．