... has been”) Vậy thì ai làm nhỉ. Present perfect and past (2) Unit 14. Present perfect and past (2) A Chúng ta không dùng thì present perfect (I have done) khi nói về một thời điểm ... quá khứ ( present perfect và past simple) qua các câu sau: Present perfect (have done) I’ve done a lot of work today. Hôm nay tôi đã làm nhiều việc. Chúng ta dùng thì present perfect khi ... viết sách). C Chúng ta dùng thì present perfect để đưa ra những thông tin mới (xem UNIT 7). Nhưng nếu chúng ta tiếp tục nói về điều đó, chúng ta dùng thì past simple: A: Ow! I’ve burnt myself....
... but we (have / not) time to talk then. Simple Past or PresentPerfect SimpleExercise 2Put the verbs into the correct tense (simple past or presentperfect simple).1. A: I (cycle / just) 50 km. ... 10. B: I (be / not) to Australia yet. Simple Past or PresentPerfect SimpleExercise 3Put the verbs into the correct tense (simple past or presentperfect simple).1. A: (you / be / ever) to ... SentencesPut the verbs into the correct tense (simple past or presentperfect simple).10 Put the verbs into the correct tense (simple past or presentperfect simple).1. He (leave / just) his house....
... Energy Harvesting Technologies – Past, Present and Future 120 ()23__ _ca cthhsthAlO thCuTTQR R R=+ + + (19) Rth_hs is the thermal resistance represented by a heat sink and it takes ... Harvesting Technologies – Past, Present and Future 110 about tens of mV resulting from very small temperature gradients, equaling to single Celsius degrees. In fact, some presented prototypes ... 0 0 0 0 0 1 -1 Electrothermal Macromodel of TEG TH TA TC VS Sustainable Energy Harvesting Technologies – Past, Present and Future 112 The most commonly used thermocouples in...
... pp.251-259, 2008.168Sustainable Energy Harvesting Technologies – Past, Present and Future 14 Sustainable Energy Harvesting Technologies: Past, Present and FutureAt 400 lux, the maximum power that the ... aqueous156Sustainable Energy Harvesting Technologies – Past, Present and Future 12 Sustainable Energy Harvesting Technologies: Past, Present and FutureFig. 13. Voltage across PV panelFig. ... W/m2.162Sustainable Energy Harvesting Technologies – Past, Present and Future 10 Sustainable Energy Harvesting Technologies: Past, Present and Future4. Hybrid flexible energy harvesting and...
... to school?3- How long the road (be)?4- How long they (teach) here? VIII-Grammar in use.A -Present perfect. 1-Structure Have Ved/PII(QKPT)*Ved work -> worked*PII do ->did ->done2-Usagesa-have...
... Topic4: MY NEIGHBORHOODPERIOD 14. PRESENTPERFECT WITH SINCE AND FORA. Revision: The PresentPerfect Tense 1. Form - Affirmative: S + has/have +V3/ed…. - ... very dirty. We haven't cleaned it …………… ages. II. Put the verbs in parentheses into the presentperfect tense:1 He (practice)_______________ the piano Since 8 o'clock.2 I (not meet)...
... supermarket. PresentPerfect - UseThe PresentPerfect is not easy to understand for ESL learners. It is a combination of past and present. An actions in the past has something to do with the present. 1) ... nowrecentlysinceforSignal Words of Present Perfect already, ever, just, never, not yet, so far, till now, up to now Form of the PresentPerfect We form the PresentPerfect with have and the past participle ... (has) with affirmative or negative sentences. Present Perfect - SpellingYou have to know all forms of the irregular verbs very well. For the PresentPerfect you need the form of the verb which...