1. Bob asked me what I was doing.
Explanation: To convert the question into indirect speech, we need to change the pronoun, tense, and reporting verb accordingly. Here, "you" becomes "me" since we are reporting what someone asked us. Additionally, "are" changes to "was" to reflect the past tense. Finally, we use the reporting verb "asked" to indicate that Bob asked the question.
2. Tom wondered if what he heard was true.
Explanation: To convert the question into indirect speech, we need to change the pronoun, tense, and reporting verb accordingly. Here, "Is" becomes "was" to reflect the past tense. Additionally, we use the reporting verb "wondered" to indicate that Tom expressed uncertainty about the information.
3. He wants us not to put our book there.
Explanation: To convert the imperative sentence into indirect speech, we need to use the verb "wants" to indicate someone's desire or instruction. In addition, we need to change the pronoun, tense, and word order. Here, "do not" becomes "not to," and we use the pronoun "us" to represent the person or people being addressed.
4. Bob asked Mary how she went to school.
Explanation: To convert the question into indirect speech, we need to change the pronoun, tense, and reporting verb accordingly. Here, "you" becomes "she" since we are reporting what Bob asked Mary. Additionally, "do" changes to "did" to reflect the past tense. Finally, we use the reporting verb "asked" to indicate that Bob asked the question.
Please note that in the last sentence, "I seldom ask Bob" is already in indirect speech. If you would like further clarification or examples, please let me know.