Changing Direct Speech into Indirect Speech
To change the given sentence from direct speech to indirect speech, we need to follow certain rules and guidelines. Let's break down the process step by step:

Step 1: Identify the Reporting Verb
- In this case, the reporting verb is "says."

Step 2: Identify the Reporting Verb's Object
- The object of the reporting verb is "who can do this."

Step 3: Introduce the Reporting Clause
- The reporting clause in this case would be "He says that."

Step 4: Change the Pronouns and Verb Tenses
- Since the speaker is talking about a general statement, the tense remains the same in this case.
- The pronoun "who" changes to "whoever" in indirect speech.

Step 5: Rearrange the Sentence
- Putting all the elements together, the indirect speech version of the sentence would be:
"He says that whoever can do this."
By following these steps and guidelines, you can successfully change the given sentence from direct speech to indirect speech.