1．一般现在时与一般过去时共同点：①两者均可表示人的性格、特征、爱好,以及习惯性动作,常与频度副词：often,sometimes,seldom,usually,always,once a week,three times a month,等连用.Eg:I like singing .I liked singing when I was a child.I often sing .I often sang when I was a child.②在条件和时间状语从句中,一般将来时要改为一般现在时,过去将来时要改为一般过去时.Eg:I am going to be a docter when I grow up .I am going to the zoo if it doesn’t rain .The weather is getting warmer and warmer when spring comes .2.一般现在时与一般过去时的不同点：①一般现在时表示现阶段发生的动作或状态,以及永恒不变的事实、真理和自然规律,常与时间状语today,every day,on Sunday,every morning等连用.Eg:What day is today We sometimes go to the park on Sunday.They ride bikes to school every day.I get up early every morning .Spring returns in March.He said spring returns in March..The sun is bigger than the moon .②一般过去时表示过去阶段发生的动作或状态,常与时间状语yesterday,last year,the day before yesterday ,the month before,this morning,five days ago等连用.Eg:What day was yesterday We sometimes went to the park on Sunday last year .They rode bikes to school the day before yesterday.I got up early this morning .I lost my pen five days ago .
