情态动词后面要接动词原形.
情态动词有：
can may must should could 等.
often 是副词.例：She often goes to school by bike.
她经常骑自行车上学.
她应该骑自行车上学.
骑自行车是不是动词
情态动词后面要接动词原形.
情态动词有：
can may must should could 等.
often 是副词.例：She often goes to school by bike.
她经常骑自行车上学.
她应该骑自行车上学.