1. Laser light differs from ordinary light.
Explanation: In this sentence, the preposition "from" is used to indicate that laser light is not the same as ordinary light. Laser light and ordinary light have different properties or characteristics.
2. This difference results from the fact that this light is more intense.
Explanation: In this sentence, the preposition "from" is used to show that the difference between laser light and ordinary light is caused by the fact that laser light is more intense. The intensity of the light is the reason for the difference.
3. ...means by which some microscopes we can observe the movement of these particles.
Explanation: In this sentence, the preposition "by" is used to indicate the means or method through which we can observe the movement of particles using some microscopes. The preposition "by" shows how something is done.
4. This material was examined using new ways.
Explanation: In this sentence, the preposition "using" is used to indicate the method or means by which the material was examined. The preposition "using" shows the way in which something is done or used.
5. He is working on the problem of using the source of light in industry.
Explanation: In this sentence, the preposition "on" is used to show the topic or subject of his work. He is focusing his efforts and attention on the problem of using the source of light in industry.
6. Many new instruments and devices have been built for this purpose lately.
Explanation: In this sentence, the preposition "for" is used to indicate the purpose or reason for which many new instruments and devices have been built. They were created specifically for this purpose.
7. This work consists of two parts, the first one having already been done.
Explanation: In this sentence, the preposition "of" is used to show the composition or components of the work. The work is made up of two parts, and the first part has already been completed.
1. It’s windy in winter.
Explanation: We use "in" to indicate a specific time period, such as a season.
2. Sue’s party is at 4 o’clock on Friday.
Explanation: We use "at" to indicate a specific time, and "on" to indicate a specific day.
3. Tom works at the hospital, doesn’t he?
Explanation: We use the question tag "doesn't he?" to confirm information and make it a question.
4. We didn’t lose the keys, did we?
Explanation: We use "did we?" as a question tag to confirm the information stated in the negative form.
5. He is a very nice man.
Explanation: "Nice" is the correct adjective to describe a person's character.
6. You drive very slowly.
Explanation: "Slowly" is the correct adverb to describe the manner of driving.
7. When did you phone her? This morning.
Explanation: "When" is used to ask about the time of an action or event.
8. How often do you visit Ann? Every Sunday.
Explanation: "How often" is used to ask about the frequency of an action or event.
9. This book belongs to me.
Explanation: "Belongs" is the correct verb form to indicate ownership by a single person.
10. Look at them! Children are diving in the lake.
Explanation: "Are diving" is the correct verb form to indicate an ongoing action in the present.
11. Mrs. Gate is going to clean her house.
Explanation: "Is going to" is used to talk about future plans or intentions.
12. Peter will pass his driving test next Sunday.
Explanation: "Will pass" is the correct verb form to indicate a future action.
13. We will have a birthday party tomorrow, some days later.
Explanation: "Will" is used to indicate a future event.
14. Children are going to inform their parents about their arrival.
Explanation: "Are going to" is used to talk about future plans or intentions.
15. Mark is as tall as Greg.
Explanation: "Tall" is the correct adjective form to compare two people's height.
16. A rabbit is smaller than a lion.
Explanation: "Smaller" is the correct comparative adjective to compare size.
17. My sister is the most beautiful girl in our class.
Explanation: "The most beautiful" is the correct superlative adjective to describe the highest degree of beauty.
18. These are Ann's pencils.
Explanation: "Ann's" is the correct possessive form to indicate ownership by Ann.
19. This is the children's room.
Explanation: "Children's" is the correct possessive form to indicate ownership by multiple children.
20. Look at the leaves of the tree.
Explanation: "Leaves of the tree" is the correct phrase to indicate the location or possession of the leaves.
21. There are many birds in the sky!
Explanation: "Many" is used to indicate a large number of countable nouns.
22. How much money has Fred got?
Explanation: "Much" is used to ask about the quantity of uncountable nouns like money.
23. Has anybody seen this?
Explanation: "Anybody" is used to refer to an indefinite person.
24. I need some help with my homework.
Explanation: "Some" is used to refer to an indefinite quantity of something.
25. There are sheep and geese in the farm.
Explanation: "Sheep" is the correct plural form, and "geese" is also the correct plural form of "goose."
26. As a rule, ladies have brushes in their bags.
Explanation: "Ladies" is the correct plural form, and "brushes" is also the correct plural form of "brush."
27. She is cooking a holiday dinner at the moment.
Explanation: "At the moment" is used to indicate the time of an ongoing action.
28. They don't usually save money.
Explanation: "Usually" is used to describe a common or typical behavior.
29. There is a little Coke in the bottle. Do you want some?
Explanation: "A little" is used to indicate a small quantity of an uncountable noun like Coke.
30. You have very few mistakes in your dictation.
Explanation: "Few" is used to indicate a small number of countable nouns like mistakes.
31. Is this your coat? No, it isn't mine.
Explanation: "Your" is used to indicate possession by the person being spoken to, and "mine" is used to indicate possession by the speaker.
32. I want this melon and those grapes.
Explanation: "This" is used to indicate something close to the speaker, and "those" is used to indicate something at a distance from the speaker.
33. I bought a strong horse. Do you like it?
Explanation: "It" is used as a pronoun to refer to a previously mentioned singular noun.
Explanation: In this sentence, the preposition "from" is used to indicate that laser light is not the same as ordinary light. Laser light and ordinary light have different properties or characteristics.
2. This difference results from the fact that this light is more intense.
Explanation: In this sentence, the preposition "from" is used to show that the difference between laser light and ordinary light is caused by the fact that laser light is more intense. The intensity of the light is the reason for the difference.
3. ...means by which some microscopes we can observe the movement of these particles.
Explanation: In this sentence, the preposition "by" is used to indicate the means or method through which we can observe the movement of particles using some microscopes. The preposition "by" shows how something is done.
4. This material was examined using new ways.
Explanation: In this sentence, the preposition "using" is used to indicate the method or means by which the material was examined. The preposition "using" shows the way in which something is done or used.
5. He is working on the problem of using the source of light in industry.
Explanation: In this sentence, the preposition "on" is used to show the topic or subject of his work. He is focusing his efforts and attention on the problem of using the source of light in industry.
6. Many new instruments and devices have been built for this purpose lately.
Explanation: In this sentence, the preposition "for" is used to indicate the purpose or reason for which many new instruments and devices have been built. They were created specifically for this purpose.
7. This work consists of two parts, the first one having already been done.
Explanation: In this sentence, the preposition "of" is used to show the composition or components of the work. The work is made up of two parts, and the first part has already been completed.