一,.频率副词是表示与次数,频率有关的副词,如:always(总是),usually(通常),often(经常)sometimes(有时),seldom(不常),hardly10%(几乎不)hardlyever(几乎从不)never(从不)once(一次),twice(两次),等。Always100%>usually85%>often75%>sometimes20%>seldom15%never0%.二,频率副词在句子中的位置1,在be动词,情态动词及第一个助动词之后。Eg,Sheisalwayskindtous.Icanneverforgettheday.Theworkhasneverbeendone.2,实义动词之前Heoftengoestoschoolearly.3,有时为了强调,可放在句首。SometimeIstayathomeduringtheweekend.三,对这些频度副词提问时,用howoften。如:SometimesIwritetomybrother.Howoftendoyouwritetoyourbrother?四,maybe和maybe一分一合,但它们的含义和用法却截然不同。maybe是副词,意思是“也许、可能”,在句中作状语,相当于perhaps,常位于句首。Maybeshe’llcomethisafternoon.她可能今天下午来。Maybeyouputthepeninyourbay.大概你把笔放在包里了。在maybe中,may是情态动词,be是动词原形,两者构成完整的谓语形式,与主语形成系表结构,意为“也许是、可能是”。Ican’tfindmywatch.Itmaybeinyourpocket.我找不到我的手表了,它可能在你的口袋里。Hemaybeasoldier.他可能是军人。