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Must与Haveto的区别,Must与Have to1.Must 表主观；Have to表客观例如：I must go now!我必须走了!I have to stay here！我只得留在这儿！,2.Must没有时态变化；而Have to有人称、数、时态的变化。例如：He must leave now.He has to leave now.3.Must的回答例如：Must you be here at 10：20?肯定回答：Yes,I must.否定回答:No,I neednt be here at 10:20.No,I dont need to be here at 10:20.No,I dont have to be here at 10:20.注意：Mustnt 表禁止！,must+动词原形 表现在的推测 She must be 45 years old.must+have+动词的过去分词 表过去的推测She must have finished her homework.否定句：将must变成:dont need to Neednt to You must come here at 2:00.You dont need to come here at 2:00.,你学会了吗？,See you!,
