2.时间状语: Always, usually, often, sometimes, every week (day, year, month…), once a week (day, year, month…), on Sundays (on Mondays…), etc. 3.基本结构：主语+动词原形(如主语为第三人称单数，动词上要改为第三人称单数形式) 4.否定形式：主语+am / is / are+not+其他;此时态的谓语动词若为行为动词，则在其前加 don ，如主语为第三人称单数，则用 doesn ，同时还原行为动词。 5.一般疑问句：把 be 动词放于句首;用助动词 do 提问，如主语为第三人称单数，则用 does，同时，还原行为动词。 eg：①It seldom snows here. 这里很少下雪。②He is always ready to help others. 他总是乐于帮助别人。③Action speaks louder than words. 事实胜雄辩。 二、一般过去时 1.概念：过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。 2.时间状语：ago, yesterday, the day before yesterday, last week, last (year,night,month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time,etc. 3.基本结构：主语+动词的过去式或 be 的过去式+名词 4.否定形式：主语+was / were+not+其他;在行为动词前加didn ，同时还原行为动词。 5.一般疑问句：was 或 were 放于句首;用助动词 do 的过去式 did 提问，同时还原行为动词。 eg：①She often came to help us in those days.那些天她经常来帮助我们。②I didn know you were so busy.我不知道你这么忙。 三、一般将来时 1.概念：表示将要发生的动作或存在的状态及打算、计划或准备做某事。 2.时间状语：Tomorrow, next day (week,month, year…), soon, in a few minutes, by…, the day after tomorrow,etc. 3.基本结构：主语+am/is / are+going to+do+其它;主语+will / shall+do+其它 4.否定形式：主语+am /is/ are not going to+do;主语+will / shall not do+其它 5.一般疑问句：be 放于句首;will / shall 提到句首。(首字母大写) eg：①They are going to have a competition with us in studies.他们将在学习中与我们竞争。②It is going to rain.天要下雨了。 四、一般过去将来时 1.概念：立足于过去某一时刻，从过去看将来，常用于宾语从句中。 2.时间状语：The next day (morning, year…), the following month (week…), etc. 3.基本结构：主语+was / were+going to+do+其它;主语+would / should+do+其它 4.否定形式：主语+was / were+not+going to+do+其它;主语+would/should+not+do. 5.一般疑问句：was 或 were 放于句首;would / should 提到句首 eg：①He said he would go to Beijing the next day. 他说他第二天要去北京。②I asked who was going there. 我问，谁要去那里。
