摘要: have to 必须.不得不 这个情态动词与上述3个不同.它有第三人称单数形式has.并且各种句式的变化与含有行为动词的句式变化相同.如:They have to go there. 否定结构为: They don't have to go there. He has to look after his little brother. 一般问句为:Does he have to look after his little brother?

网址:http://m.1010jiajiao.com/timu3_id_2742735[举报]

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网