she (spent)two hours practicing playing basketball.（）是spend的过去式吗?这里为什么要用一般过去时?

She spent two hours walking there同意句 she spent two hours in her homework.（句型转换） ——her two hours—__ her homework 2．She spent two hours doing the housework.(改为同义句) She spent two hours in working it out.(同义句转换) she spent two hours practice playing basketball为什么practice是原型 she spent two hours ( ) the work 为什么括号里的要填finishing呐? she (spent)two hours practicing playing basketball.（）是spend的过去式吗?这里为什么要用一般过去时? 为什么 Maria spent two hours (doing) the work 填doing I spent two hours doing my homework yesterday什么意思 I spent two hours ____(finish) my homework yesterday. I spent two hours on my homework.同义句 Alan spent two hours ( )(do one's homework)last night. He spent two hours mending his bike .(改为同义句) I spent two hours cleaning my room 改为同义句 they spent two hours ____(watch)the players____(play) football I spent two hours in___(finish)this task I spent two hours making the cake.(同义句转换) I spent two hours with my homework.这句话对吗