Методическая разработка по английскому языку для студентов факультета химии и химической технологии " Simple Chemistry" Алматы 2017
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мет. разработка по химии
- Бұл бет үшін навигация:
- During
- “from”
- “conditions”.
| Unit 15
Prepositions (Part 2) During or for We use during to say when something happens, if it happens in or over a period of time. We use for to talk about the length of time something lasts. Compare
She phoned me during the week to tell me that she was getting married. (referring to a point in the week) We were in the cinema for three and a half hours. Not: … Our flight to New York was delayed for seven hours. Not: … We went to Italy for a week. Not: … We can also use for to refer to public holidays and seasons: He always goes to his mother’s house for New Year. Not: … We use “during” to talk about an event or activity having little duration that happens within the same period of time, e.g.: During heating this reaction occurred more rapidly. - При нагревании эта реакция протекала быстро. BetweenBetween normally refers to something in the middle of two objects or things (or places). There are mountains between Chile and Argentina. OverWe use it to talk about an event or activity that lasted for some period of time or for the whole of it e.g.: Over three years they have tried to obtain this mixture. In this case we can also use “during”. We can use “over” to talk about the situations when one object is situated above other object. Катализатор располагали над подложкой. - Catalyst was placed over substrate. From: We use this preposition to talk about the source of originating a certain thing. Этот материал сделан из нержавеющей стали. - This material is made from stainless steel. We use this preposition to talk about the emerging of some scientific objects. Эта смесь образовалась из аммиака. - This mixture is formed from ammonia. We use this preposition to talk about time interval of an activity or distance. Синтез длился с двух до трех часов. - Synthesis lasted from 2 p.m. to 3 p.m. We use “from” in the meaning of “as a result of”. For example: Это вещество образовалось в результате гидролиза. - This substance was formed as a result of (from) hydrolysis. Under: We use this preposition to talk about conditions the existence of which can cause certain scientific processes or phenomena. In scientific texts it can be used only with the word “conditions”. This process takes place under the conditions of high pressure. – Этот процесс протекает в высокотемпературных условиях. We use “under” when we talk about the low position of some object; when object is below other object. For example: We can find the book under the table. – Мы сможем найти книгу под столом.жүктеу/скачать 422,31 Kb. Достарыңызбен бөлісу:
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