现在时的几种时态区分.pptVIP

Grammar;Present tenses are used to talk about the present time. These tenses include: simple present（一般现在时） present continuous（现在进行时） present perfect（现在完成时） present perfect continuous（现在完成进行时） ;we use the simple present tense to talk about things that: 1.The sun rises in the east. 2.The Academy Award show is on television every year. 3.Every time a prop comedian tells a joke, he or she uses a thing, called a prop.;1这里很少下雪 2他喜爱体育运动 3太阳从东方升起 4他总是乐于助人;Note 2(skip) 1.It’ll be a long time before we ______(meet) again. 2.Even if it ______(rain) tomorrow, we’ll go. 3.I’ll call on you unless it ______(rain) tomorrow. 4.I’ll stay with you so long as there_______(be) is a room free. ;Note 3 1.The plane takes off at 10 a.m.tomorrow. 2.We leave for Beijing next week. 3.The film starts at 7 p.m. this evening. 4.My birthday is in two week’s time.;Note 4 (skip) 1.Look! Here comes the bus! 2.There goes the bell!; ;3.You look lovely when you are smiling.;We use the present perfect tense（现在完成时） to talk about how the past and present are connected. We use it for: things that happened in the past, but have an effect on the present.事情或动作发生在过去，但对现在造成了影响。现在完成时侧重动作产生的效果； Eg:① Doctors have found that people who laugh a lot live longer! ②Bill has been in many films and television shows. ; time marker： （时间标志） ----already; never; ever; just; before; recently; lately; yet; so far; by now; up till now; up to the present; for; since;several times;1.In the past there _________(be) no trees in or around the village. 2.For the past three weeks, I ___________ (not see) him. 3.我读完这本书后将给出我的观点。;Can you tell me the tense（时态） of the two sentences? 1.Doctors have been researching（研究） that question. 2.Mr. Smith has been living in London since 1978． ;简单的比较：现在完成进行时和现在完成时;（a）句有“苹果未被全部吃光”的意思，（b）句是完成时态，说明“苹果一个不剩了”。;Helen has read a book about The Family. (可表示海伦已经读完了)H