TAILIEUCHUNG - Fundamentals of english grammar third edition part 17

Rather than asking students to study a whole chapter of these phrases at one time, the text uses appendices to present them in smaller groupings for teachers to intersperse throughout the teaching term. Another specific change is the omission of conditional sentences* which are presented in Understanding and Using English Grammar. | 4-7 PRESENT PERFECT PROGRESSIVE vs. PRESENT PERFECT 1 yz PRESENT PERFECT PROGRESSIVE a Rita and Josh are talking on the phone. They have been talking on the phone for twenty minutes. The present perfect progressive expresses the duration of present activities that are in progress using action verbs as in a . PRESENT PERFECT b Rita has talked to Josh on the phone many times before now . c INCORRECT Rita has been talking to Josh on the phone many times. d Rita has known Josh for two years. e INCORRECT Rita has been knowing Josh for two years. The present perfect expresses 1 repeated activities that occur at unspecified times in the past as in b or 2 the duration of present situations as in d using non-action verbs. f I have been living here for six months. OR g I have lived here for six months. h Al has been wearing glasses since he was ten. OR Al has worn glasses since he was ten. i Vve been going to school ever since I was five years old. OR I ve gone to school ever since I was five years old. For some not all verbs duration can be expressed by either the present perfect or the present perfect progressive f and g have essentially the same meaning and both arc correct. Often either tense can be used with verbs that express the duration of usual or habitual activities situations things that happen daily or regularly . fee work teach smoke wear glasses play chess go to school read the same newspaper every morning etc. EXERCISE 25. Present perfect vs. the present perfect progressive. Chart 4-7 Directions Complete the sentences. Use the present perfect or the present perfect progressive. In some sentences either form is possible. 1. A I m tired. We walk been _ for more than an hour. Let s stop and rest for a while. B Okay. 2. A Is the post office far from here B Not at all. I walk IaaVC w inlkg A there many times. 100 CHAPTER 4 3. A Do you like it here B I live U nve been liyihg k nve liveA here for only a short while. I don t know yet. 4. A I read .

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