past perfect vs past simple worksheet pdf

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... trong quá khứ. S 1 + Past Perfect + before + S 2 + Simple Past EX: George had seen this movie before he went to bed last night. S 1 + Simple Past + after + S 2 + Past Perfect EX: George went ... PAST PERFECT TENSE (THÌ QUÁ KHỨ HOÀN THÀNH) I/ Use (Cách dùng) Past Perfect Tense được dùng để diễn tả: 1. Một hành động xảy ra trước ... Perfect EX: George went to bed after he had seen this movie last night. S 1 + Past Perfect + when + S 2 + Simple Past EX: When I came back home yesterday, my friend had already been there. II/...

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... same time in the past. Eg. Mark was reading a book and Tony was watching television. BE CAREFUL!!!! The past continuous and the past simple are often used together. The past simple interrupts ... action of the past continuous. Eg. I was watching television when my friend arrived. BE CAREFUL!!!! The past continuous and the past simple are often used together. The past simple interrupts ... Put the verbs in brackets into the past continuous or simple past: 1. Lisa _____________ (comb) her hair while she ____________(listen to) the news...

Ngày tải lên: 31/08/2013, 01:10

... FOCUS ON: past perfect phrasal verbs The past perfect is used to say that one thing in the past happened before another thing in the past: Mike said the wedding had fallen through. past earlier ... the past When I got to work, Mr. Toy for had already signed in. past earlier in the past The past perfect is formed with had and the past participle of the verb: present: He wakes up. past: ... the verb: present: He wakes up. past: He woke up. past perfect: He had woken up. Infinitive present tense -ing form past tense past participle back off back off & backs off...

Ngày tải lên: 01/11/2013, 15:20

... 100 0 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 ... 81.4% 120 100 80 -20 40 60 0 20 T [ o C ] Sustainable Energy Harvesting Technologies – Past, Present and Future 116 resistive load R L , the voltage V S forces a Peltier current ... low thermal conductivity λ. 2 Z α ρ λ = (1) Sustainable Energy Harvesting Technologies – Past, Present and Future 124 5.1 Examples of simulations Output voltage V S from the TEG for...

Ngày tải lên: 19/06/2014, 08:20

... pp.251-259, 2008. 168 Sustainable Energy Harvesting Technologies – Past, Present and Future 14 Sustainable Energy Harvesting Technologies: Past, Present and Future At 400 lux, the maximum power that ... in aqueous 156 Sustainable Energy Harvesting Technologies – Past, Present and Future 12 Sustainable Energy Harvesting Technologies: Past, Present and Future Fig. 13. Voltage across PV panel Fig. ... 2.67 W/m 2 . 162 Sustainable Energy Harvesting Technologies – Past, Present and Future 10 Sustainable Energy Harvesting Technologies: Past, Present and Future 4. Hybrid flexible energy harvesting...

Ngày tải lên: 19/06/2014, 08:20

... 101-106, Kyoto, Japan, March, 2010 [5] http://www.secomtel.com/UpFilesPDF /PDF/ Agilent /PDF_ DOCS/SKYDIODE/ 03_ SKYDI/HSMS2850 .PDF (Last accessed on 13 July, 2011) [6] McSpadden, J. et al., H. (1992). ... Ctmr = 820 pF Vsn, Ctmr = 520 pF Vsn, Ctmr = 820 pF Vout, Ctmr = 520 pF Vout, Ctmr = 820 pF 11.21.41.61.82 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 Fosc (Gate Signal) Vsn (Switching signal) ... applications for both DTV and cellular RF energy harvesting have been proposed and demonstrated with simple examples. A discussion is also presented on the typical performance analysis for the proposed...

Ngày tải lên: 19/06/2014, 08:20