27. My brother (works) in this factory for many years.
- Explanation: This sentence describes a habitual action, so we use the simple present tense.
28. The children (were playing) soccer at 4 o'clock yesterday.
- Explanation: This sentence refers to a past action that happened at a specific time, so we use the simple past tense.
29. I (see) Nga at the bus stop every morning.
- Explanation: This sentence describes a habitual action, so we use the simple present tense.
**30. What were you doing last night?
- Explanation: This is a question about a past action, so we use the simple past tense.
**31. It is often hot in the summer.
- Explanation: This sentence describes a general truth, so we use the simple present tense.
**32. My mother went to the supermarket yesterday, but she didn't buy anything.
- Explanation: Both sentences describe past actions, so we use the simple past tense.
**33. Nam and Ba are playing soccer at present.
- Explanation: This sentence describes an action happening at the present moment, so we use the present continuous tense.
**34. My family is going to Da Lat next summer.
- Explanation: This sentence describes a future plan, so we use the present continuous tense to express future plans.
**35. I'd like to tell you something about my family.
- Explanation: This sentence expresses a desire or intention, so we use the infinitive form.
**36. She needs to eat a lot of vegetables and fruit.
- Explanation: This sentence expresses a necessity, so we use the infinitive form.
**37. Please don't make so much noise. I am studying.
- Explanation: This sentence describes an action happening at the present moment, so we use the present continuous tense.
**38. The water boils at 100 degrees Celsius.
- Explanation: This sentence describes a scientific fact, so we use the simple present tense.
**39. Look! Somebody is climbing up that tree over there.
- Explanation: This sentence describes an action happening at the present moment, so we use the present continuous tense.
**40. I haven't seen her since last week.
- Explanation: This sentence describes a past action that started in the past and continues up to the present, so we use the present perfect tense.
**41. How long have you known Tom?
- Explanation: This sentence asks about a duration that started in the past and continues up to the present, so we use the present perfect tense.
**42. Hoa burned her hand when she was cooking dinner.
- Explanation: The first action happened in the past and caused the second action, so we use the simple past tense for both.
**43. While we were crossing the street, the policeman shouted at us.
- Explanation: Both actions happened at the same time in the past, so we use the past continuous tense for both.
**44. What were you doing at this time yesterday?
- Explanation: This is a question about a past action at a specific time, so we use the past continuous tense.
**45. I hope it doesn't rain when we start early tomorrow.
- Explanation: The first verb is used to express a wish or hope about a future event, so we use the simple present tense. The second verb is used to express a future plan, so we use the simple present tense.
**46. My sister has been playing the piano since she was a child.
- Explanation: The first verb expresses an action that started in the past and continues up to the present, so we use the present perfect continuous tense. The second verb is used to describe a past state, so we use the simple past tense.
**47. I will never forget what you just told me.
- Explanation: The first verb expresses a future action, so we use the simple future tense. The second verb refers to a past action that just happened, so we use the simple past tense.
**48. He left home two weeks ago and we haven't heard from him since.
- Explanation: The first verb describes a past action that happened at a specific time, so we use the simple past tense. The second verb expresses an action that started in the past and continues up to the present, so we use the present perfect tense.
**49. She won the gold medal in 2004.
- Explanation: This sentence describes a past action that happened at a specific time, so we use the simple past tense.
**50. While you were playing the guitar, I was writing a letter.
- Explanation: Both actions happened at the same time in the past, so we use the past continuous tense for both.
**51. We have been studying English since 2000.
- Explanation: This sentence expresses an action that started in the past and continues up to the present, so we use the present perfect continuous tense.
**52. I wish they were here now.
- Explanation: This sentence expresses a wish about a present situation, so we use the simple past tense.
**53. We used to walk to school.
- Explanation: This sentence describes a past habit or routine, so we use the used to structure.
**54. Wearing uniforms makes students feel equal in many ways.
- Explanation: This sentence expresses a general truth, so we use the simple present tense.
**55. This school was built 15 years ago.
- Explanation: This sentence describes a past action that happened at a specific time, so we use the simple past tense.
**56. When I arrived home last night, my mother was watching TV.
- Explanation: The first action happened at a specific time in the past, and the second action was happening at the same time, so we use the simple past tense for the first verb and the past continuous tense for the second verb.
**57. I was used to eating at noon when I started school.
- Explanation: This sentence describes a past habit, so we use the used to structure.
**58. He used to eat dinner at five o'clock.
- Explanation: This sentence describes a past habit, so we use the used to structure.
**59. When I was young, I used to swim everyday.
- Explanation: This sentence describes a past habit, so we use the used to structure.
**60. He used to like her, but he doesn't anymore.
- Explanation: This sentence describes a past habit that no longer happens, so we use the used to structure.
**61. Don't worry, some day you will get used to speaking English.
- Explanation: This sentence expresses a future action that will become a habit, so we use the infinitive form.
**62. Lan can't get used to studying late at night.
- Explanation: This sentence expresses a difficulty in getting accustomed to a new habit, so we use the -ing form.
**63. He used to dance every night, but now he studies.
- Explanation: This sentence describes a past habit that no longer happens, so we use the used to structure.
**64. Adam is used to sleeping late on the weekends.
- Explanation: This sentence expresses a habit that Adam is accustomed to, so we use the -ing form.