Subject: English

Explanation
Active voice: " Did you catch the fly? " (past simple, interrogative) Passive voice: Start with " Was " (since " fly " is singular and past tense is used) " catch " → " caught " (past participle) Subject " you " comes after " by " Correct passive voice: Was the fly caught by you?

Explanation
Negative imperative sentence → passive voice starts with "Let... not be + past participle" " Do not pay " → "Let... not be paid" Object " him " becomes the subject in passive. Correct passive voice: Let him not be paid anything.

Explanation
Imperative sentence → passive voice starts with " Let " Base verb " strike off " → past participle is " struck off " Structure : Let + object + be + past participle Correct passive voice: Let his name be struck off.

Explanation
Tense : Future simple (will buy) Passive structure : will be + past participle " buy " → bought (past participle) Subject " he " → him Reflexive pronoun remains: for himself Correct passive voice: A ticket will be bought by him for himself.

Explanation
Tense : Present simple (They buy) Passive structure : Object + is/are + past participle + by + subject " Flowers " is plural → use " are " Past participle of buy is bought Correct passive voice: Beautiful flowers are bought by them.

Explanation
This is an interrogative sentence (yes/no question). " Did you see " → "I had seen" (past simple → past perfect) " my " → "her" " this room " → "that room" " said to " → "asked" We can use " if " or " whether " in indirect questions. So both are correct : She asked me whether I had seen her daughter in that room. She asked me if I had seen her daughter in that room.

Explanation
The sentence expresses a wish or prayer , so in indirect narration we use " prayed ". Changes: " May " → "might" " here " → "there" So, the correct indirect narration is: They prayed that train might reach there in time.

Explanation
This is a question sentence in indirect narration. Changes : " said to " → " asked " " were you sitting " → " they had been sitting " (past continuous → past perfect continuous) " here " → " there " So, the correct narration is: He asked them why they had been sitting there.

Explanation
Direct speech: " I broke my pencil today ." Changes in indirect speech: " I " → "she" " broke " (past) → "had broken" (past perfect) " my " → "her" " today " → "that day" So, the correct indirect narration is: She said to him that she had broken her pencil that day.

Explanation
Direct speech : " You are my best friend. " Indirect speech : Pronouns and tense change: " You " → " I " " are " (present) → " was " (past) " my " → " his " So the correct narration is: He said that I was his best friend.

Explanation
Active voice: " Did you catch the fly? " (past simple, interrogative) Passive voice: Start with " Was " (since " fly " is singular and past tense is used) " catch " → " caught " (past participle) Subject " you " comes after " by " Correct passive voice: Was the fly caught by you?

Explanation
Negative imperative sentence → passive voice starts with "Let... not be + past participle" " Do not pay " → "Let... not be paid" Object " him " becomes the subject in passive. Correct passive voice: Let him not be paid anything.

Explanation
Imperative sentence → passive voice starts with " Let " Base verb " strike off " → past participle is " struck off " Structure : Let + object + be + past participle Correct passive voice: Let his name be struck off.

Explanation
Tense : Future simple (will buy) Passive structure : will be + past participle " buy " → bought (past participle) Subject " he " → him Reflexive pronoun remains: for himself Correct passive voice: A ticket will be bought by him for himself.

Explanation
Tense : Present simple (They buy) Passive structure : Object + is/are + past participle + by + subject " Flowers " is plural → use " are " Past participle of buy is bought Correct passive voice: Beautiful flowers are bought by them.

Explanation
This is an interrogative sentence (yes/no question). " Did you see " → "I had seen" (past simple → past perfect) " my " → "her" " this room " → "that room" " said to " → "asked" We can use " if " or " whether " in indirect questions. So both are correct : She asked me whether I had seen her daughter in that room. She asked me if I had seen her daughter in that room.

Explanation
The sentence expresses a wish or prayer , so in indirect narration we use " prayed ". Changes: " May " → "might" " here " → "there" So, the correct indirect narration is: They prayed that train might reach there in time.

Explanation
This is a question sentence in indirect narration. Changes : " said to " → " asked " " were you sitting " → " they had been sitting " (past continuous → past perfect continuous) " here " → " there " So, the correct narration is: He asked them why they had been sitting there.

Explanation
Direct speech: " I broke my pencil today ." Changes in indirect speech: " I " → "she" " broke " (past) → "had broken" (past perfect) " my " → "her" " today " → "that day" So, the correct indirect narration is: She said to him that she had broken her pencil that day.

Explanation
Direct speech : " You are my best friend. " Indirect speech : Pronouns and tense change: " You " → " I " " are " (present) → " was " (past) " my " → " his " So the correct narration is: He said that I was his best friend.

Explanation
Active voice: " Did you catch the fly? " (past simple, interrogative) Passive voice: Start with " Was " (since " fly " is singular and past tense is used) " catch " → " caught " (past participle) Subject " you " comes after " by " Correct passive voice: Was the fly caught by you?

Explanation
Negative imperative sentence → passive voice starts with "Let... not be + past participle" " Do not pay " → "Let... not be paid" Object " him " becomes the subject in passive. Correct passive voice: Let him not be paid anything.

Explanation
Imperative sentence → passive voice starts with " Let " Base verb " strike off " → past participle is " struck off " Structure : Let + object + be + past participle Correct passive voice: Let his name be struck off.

Explanation
Tense : Future simple (will buy) Passive structure : will be + past participle " buy " → bought (past participle) Subject " he " → him Reflexive pronoun remains: for himself Correct passive voice: A ticket will be bought by him for himself.

Explanation
Tense : Present simple (They buy) Passive structure : Object + is/are + past participle + by + subject " Flowers " is plural → use " are " Past participle of buy is bought Correct passive voice: Beautiful flowers are bought by them.

Explanation
This is an interrogative sentence (yes/no question). " Did you see " → "I had seen" (past simple → past perfect) " my " → "her" " this room " → "that room" " said to " → "asked" We can use " if " or " whether " in indirect questions. So both are correct : She asked me whether I had seen her daughter in that room. She asked me if I had seen her daughter in that room.

Explanation
The sentence expresses a wish or prayer , so in indirect narration we use " prayed ". Changes: " May " → "might" " here " → "there" So, the correct indirect narration is: They prayed that train might reach there in time.

Explanation
This is a question sentence in indirect narration. Changes : " said to " → " asked " " were you sitting " → " they had been sitting " (past continuous → past perfect continuous) " here " → " there " So, the correct narration is: He asked them why they had been sitting there.