... and (ii) are treated in Sections 5 and 6, respectively. Sections 7 and 8 are devoted to step (iii). Sections 9 and 10 are concerned with Steps (iv) and (v). Section 11 deals with steps (vi) and ... Classical and modular approaches to exponential Diophantine equations I. Fibonacci and Lucas perfect powers By Yann Bugeaud, Maurice Mignotte, and Samir Siksek* CLASSICAL AND MODULAR ... the perfect powers in the Fibonacci and Lucas sequences naturally reduces to the problem of solving the followingpair of equations:Fn= yp,n≥ 0, and p prime,(5) and Ln= yp,n≥ 0, and...
... has a lot of exams coming up soon, and he is also working on a term paper. He must have been studying at the library. Unit 5: Possibility and Probability Perfect ModalsI. Possibility: May, ... room are turned off. She must be sleeping. (right now). Past time:MODAL + have been + v-ingMeaning: in progress at a time in the past. ã Ex1: Sue wasn’t at home last night when we went ... In negative sentences both must not and don’t have to (also don’t need to and need not) are used. Must not is used when the speaker expects or orders...
... ạBình_ B c Ninhắ Present Simple and Present Continuous By Nguyen Trong Longtronglongnguyen@yahoo.com 09/16/13 Nguyễn Trọng Long_Vạn Ninh_ Gia Bình_ Bắc NinhWe use the presentsimple for things ... 09/16/13 Nguyễn Trọng Long_Vạn Ninh_ Gia Bình_ Bắc NinhThe PresentContinuous is used to express the actions we are doing in this moment or what is happening ... 09/16/13 Nguy n Tr ng Long_V n Ninh_ Gia ễ ọ ạBình_ B c NinhắAnswer these questions and then practice with a classmate and take his/her notes. AnswersãWhat do you do in your free time? ___________________ã...
... Presentcontinuousandpresentsimple Unit 3. Presentcontinuousandpresentsimple (1) A Hãy nghiên cứu các lời giải thích và so sánh các ví dụ sau: Present continuous (I ... việc vất vả thật” “Ừ, mình có nhiều việc phải làm quá.”) Xem thêm UNIT 1. Present Simple (I do) I can’t understand why he’s being so selfish. He isn’t usually like that. Tôi không hiểu ... Sarah rất mệt (không dùng ‘Sarah is being tired’) D Look và feel Bạn có thể dùng thì presentsimple hay continuous khi diễn tả dáng vẻ hay cảm giác của người nào đó vào thời điểm nói: You...
... Động từ be chia ở thì presentcontinuous là I am being/He is being. You are being v.v… I’m being = I’m behaving / I am acting. So sánh các câu sau: I can’t understand why he’s being so selfish. ... Sarah rất mệt (không dùng ‘Sarah is being tired’) D Look và feel Bạn có thể dùng thì presentsimple hay continuous khi diễn tả dáng vẻ hay cảm giác của người nào đó vào thời điểm nói: You ... có một khoảng thời gian hạnh phúc. B See, hear, smell, taste Ta thường dùng thì presentsimple (không dùng continuous) với những động từ dưới đây: Do you see that man over there? (not ‘are...
... việc vất vả thật” “Ừ, mình có nhiều việc phải làm quá.”) Xem thêm UNIT 1. Present Simple (I do) Hãy dùng thì PresentSimple để đề cập tới các sự việc một cách chung chung, hay những sự việc ... to swim when they are children. (Hầu hết mọi người học bơi khi họ còn nhỏ.) Hãy dùng thì PresentSimple để diễn đạt một tình huống hay trạng thái có tính ổn định, lâu dài: My parents live...
... comeB. Do/ comeC. Is/ comingD. Is/ coming. PresentsimpleandPresent continuous ( Hiện tại đơn và hiện tại tiếp diễn) Present simplePresent continuous Use + Diễn tả thói quen ở hiện tại.+ ... qickly that I ___ (not understand) him.A. speaks/ don’t understandB. is speaking/ don’t understandC. speak/ doesn’t understandD. is speaking/ am not understanding.10. I’m going for a walk. ... Ving…Adv Always, often, seldom, usually, sometime, everyday/week/month,…At the moment, at the present, now, right now, today…Note 1 số verb chỉ tình trạng không có dạng Ving như: believe,...
... recently, don’t you think?6 My grandfather died 30 years ago. I (never/meet) him.4. Fill in the blanks with modals: must - have to - ought to - used to1. You wash your hands before meals.2. It’s ... seventeen. In the play, she must appear in a bright red dress and long black stockings. Last year in another play, she had to wear short socks and a bright, orange-colored dress. If anyone asks her ... the party?7. There are many clouds in the sky. It (rain) ….…… ……………………………6. Read the passage and answer the following questions: My aunt Nhan is an actress. She must be at least thirty-five....
... TOPIC 2: OUR PAST PERIOD 8: PRESENT SIMPLE, PASTSIMPLEAND PREPOSITIONS OF TIMEA. Theory:1. Presentsimpleandpast simple: Tenses Affirmation Negation Interrogation Present simple S + am/ ... weekend/ …- AT + time/ weekends/ present/ this time/ the moment/ …- AFTER / BEFORE + time- BETWEEN + time and timeB. Exercises: I. Put the verbs in the presentsimple tense1. We often (do) ____________ ... morning, Tuan and his father go jogging around Xuan Huong Lake. Hoa and her mother walked along Bui Thi Xuan Street and then visited the flower garden. Hoa liked it very much and the flowers...
... (Non -Continuous Verbs): speakers sometimes use the SimplePresent to express the idea that an action is happening or is not happening now. This can only be done with Non -Continuous Verbs and ... that the meaning is like Simple Present, but with negative emotion. Remember to put the words "always" or "constantly" between "be" and "verb + ing."Examples: ... do.Examples: I play tennis.Facts or Generalizations: the SimplePresent can also indicate the speaker believes that a fact was true before, is true now, and will be true in the future. It is not important...