短语词组用作副词 (adv.)~+动词often come 经常来often go 经常去often hear 经常听见often meet 经常遇见often rain 经常下雨often write to sb 经常给某人写信~+副词often damp 通常很潮湿often difficult 通常很难often tall 通常很高短语 返回 oftener