表示过去某一时刻或某一段时间内所发生的动作或情况,通常一般过去式带有表示动作时间状语的词,词组或从句,如 yesterday, the day before last, last week, two days ago 等,上下文清楚时可以不带时间状语。 i worked in that factory last year. 去年我在那一家工厂工作。 i went to the tian long mountain yesterday. 昨天我们去了天龙山。肯定句:主语+动词过去式+其他i helped you just now.i was there yesterday.否定句:主语+did not+动词原形+宾语+宾语补足语she did not say that.或主语+be的过去式+not+其他it was't true. she was not a student.一般疑问句:did+主语+动词原形+宾语+宾语补足语did you see him in the morning?或be的过去式+主语+其他was he hansome in the show last night?特殊疑问句:what/where/how/when+did+主语+动词原形+其他what/where/how/when+be的过去式+主语+其他what was it that made you so nervous?what did she do last summer?how did you get the ticket?where did you go?when did he come back?一般过去式句式转换“口诀”1.一般过去时并不难,过去动作、状态记心间。2.动词要用过去式,时间状语句末站。3.否定句很简单,didn't 站在动原前,其它部分不要变。4.一般疑问句也好变,did放在句子前,主语、动原、其它部分依次站立。5.特殊疑问句也简单,疑问词加一般疑问句记心间。6.最后一条请注意,动词过去式要牢记!7. 一般过去时公式:(1)肯定句:主语+(动词)过去式+其他。(2)一般疑问句:did+主语+动词原形+其他?(肯定回答):yes, 主语+did.(否定回答):no, 主语+didn’t.(3)否定句:主语+didn’t+动词原形+其他.(4)特殊疑问句:特殊疑问词+did+主语+动词原形+其他?希望能帮到你 20210311
mj:=8;t:=100;a1:=cost(85);a2:=cost(15);a3:=(a1-a2);a4:=(a1+a2)/2;a5:=a3/a4*100<mj;b1:=hhv(high,t);b2:=llv(low,t);b3:=b1-b2;b4:(a4-b2)<b3/2;低位单峰密集:a5 and b4;根据思路编写公式,修改公式。盘中预警,条件选股。公式解密,去除时间限制。鼠标...