[答案]
Ioftencometoschoolbysubway.
[解析]
考查陈述句的肯定形式。首先根据所给词汇及标点,可确定组合的句子为一般现在时的陈述句,组合的句意:我经常乘地铁来学校。I我,做主语,放于句首;often经常,时间频率副词,常放于主语后谓语动词前;come to school 来学校,是固定搭配,放于主语后;by subway乘地铁,是介词短语,表示交通方式,放于句末,结合整句及英语表达的习惯作答。
故答案为:I often come to school by subway.
[点评]
本题考查了"陈述句肯定形式,",属于"常考题",熟悉题型是解题的关键。