Open the brackets using the correct forms of the verbs and write the sentences. Explain your answer. 1. Once, when Kate... (go) home after school, she... (meet) her friend Jane. They …
(not see) each other for a long time.
2. Do you know the man who... (stand) at the bus stop. It seems to me ... (meet)
him before but can't remember where it... (happen).
3. Don't come into room, the students ... (write) a test there.
4. ... (you see) My book? I... (lose) it some time ago.
5. The children... (play) football after classes yesterday
6. How long... (you, study) English? - I... (begin) to learn it when I... (be) 8.
7. I'm sure my younger sister... (watch) TV when I come home from school tomorrow.
She... (like, watch) cartoons very much.
8. My elder brother often... (spend) time playing computer games. Now he... (sit) in
the neighbouring room in front of a computer screen. He's... (play) online for an hour already.
9. The boys... (play) football after classes yesterday when suddenly the rain began. They said they... (play) for a long time.

1. Once, when Kate was going home after school, she met her friend Jane. They had not seen each other for a long time.
Explanation: This sentence is in the past tense. "was going" and "met" are the correct forms of the verbs "go" and "meet" for the past tense. "had not seen" is the correct form of the verb "see" for the past perfect tense, indicating that the action of not seeing each other occurred before the meeting.

2. Do you know the man who was standing at the bus stop. It seems to me I had met him before but can't remember where it happened.
Explanation: This sentence is also in the past tense. "was standing" is the correct form of the verb "stand" for the past tense. "had met" is the correct form of the verb "meet" for the past perfect tense, indicating that the action of meeting him occurred before the speaker's current state of not remembering where it happened.

3. Don't come into the room, the students are writing a test there.
Explanation: This sentence is in the present tense. "are writing" is the correct form of the verb "write" for the present continuous tense, indicating that the action of writing is happening at the moment of speaking.

4. Have you seen my book? I lost it some time ago.
Explanation: This sentence is in the present perfect tense. "Have you seen" is the correct form of the verb "see" for the present perfect tense, indicating that the action of seeing the book is connected to the present moment. "lost" is the correct form of the verb "lose" for the past tense, indicating that the action of losing the book occurred some time ago.

5. The children played football after classes yesterday.
Explanation: This sentence is in the past tense. "played" is the correct form of the verb "play" for the past tense, indicating that the action of playing football occurred in the past.

6. How long have you been studying English? - I began to learn it when I was 8.
Explanation: This sentence is in the present perfect continuous tense and past tense. "have been studying" is the correct form of the verb "study" for the present perfect continuous tense, indicating that the action of studying English started in the past and is still happening in the present. "began" is the correct form of the verb "begin" for the past tense, indicating that the action of beginning to learn English occurred when the speaker was 8 years old. "was" is the correct form of the verb "be" for the past tense, indicating the speaker's age at the time of the action.

7. I'm sure my younger sister will be watching TV when I come home from school tomorrow. She likes to watch cartoons very much.
Explanation: This sentence is in the future tense and present simple tense. "will be watching" is the correct form of the verb "watch" for the future continuous tense, indicating that the action of watching TV will be happening at the specific time mentioned in the future. "likes" is the correct form of the verb "like" for the present simple tense, indicating a general fact or habitual action.

8. My elder brother often spends time playing computer games. Now he is sitting in the neighboring room in front of a computer screen. He has been playing online for an hour already.
Explanation: This sentence has a mixture of tenses. "often spends" is the correct form of the verb "spend" for the present simple tense, indicating a habitual action. "is sitting" is the correct form of the verb "sit" for the present continuous tense, indicating the current action of sitting. "has been playing" is the correct form of the verb "play" for the present perfect continuous tense, indicating that the action of playing online started in the past and is still happening in the present.

9. The boys were playing football after classes yesterday when suddenly the rain began. They said they had been playing for a long time.
Explanation: This sentence is in the past tense. "were playing" is the correct form of the verb "play" for the past continuous tense, indicating that the action of playing football was happening in the past. "began" is the correct form of the verb "begin" for the past tense, indicating the start of the action of rain. "had been playing" is the correct form of the verb "play" for the past perfect continuous tense, indicating that the action of playing football had already been happening before the rain started.