If he makes a proper use of his time, he is sure to prosper in life. (Simple)

To change an assertive sentence into an interrogative sentence, the general rule is to start with an auxiliary verb (if available) or 'do/does/did', and then follow with the subject and the rest of the sentence, often adding 'not' to maintain the original meaning. If the assertive sentence is positive, the interrogative is usually negative to imply agreement with the original statement. In this case, "Man is the maker of his own fortune" is a positive assertive sentence, so its interrogative form becomes negative interrogative.

A complex sentence contains an independent clause and at least one dependent clause. An independent clause can stand alone as a complete thought, while a dependent clause cannot. In the transformed sentence, "A person is sure to repent later" is the independent clause, expressing the main idea.

The clause "who does otherwise" is a dependent clause because it cannot stand alone as a complete sentence and relies on the independent clause for its full meaning. It is a relative clause, introduced by the subordinating conjunction "who," which modifies the noun "person." This structure creates a complex sentence by linking the main statement with additional information.

An exclamatory sentence expresses strong emotion or feeling. To change an assertive sentence into an exclamatory one, you often use words like "How" or "What" at the beginning, followed by the subject and verb, and ending with an exclamation mark.

If the assertive sentence contains "very," "greatly," or similar intensifiers, they are usually replaced by "How" or "What a/an." In this case, "miserably" is an adverb describing the suffering, so "How miserably" effectively conveys the strong emotion.

To change an assertive sentence into an interrogative sentence, we generally invert the subject and the auxiliary verb. If the assertive sentence is positive, the interrogative form is often negative to retain the original meaning, implying that the statement is true. In this sentence, 'is' is the main verb acting as the auxiliary. Therefore, by placing 'Is' at the beginning and adding 'not' before the predicate, the sentence becomes interrogative while preserving its original emphatic meaning.

An assertive sentence states a fact or makes a declaration. When transforming a negative sentence containing "nothing but" into an assertive one, the phrase "nothing but" is typically replaced with "only" to maintain the original meaning. The original sentence implies that life consists exclusively of hours, days, and years. By replacing "nothing but" with "only," the sentence becomes a positive statement affirming the same idea.

This is an example of changing the degree of comparison from superlative to positive. When converting a superlative sentence (using 'the most' or '-est') to a positive degree, if the superlative does not involve 'one of the', the positive sentence typically begins with 'No other' followed by the noun phrase from the original sentence.

The structure for this specific type of transformation is: No other + singular noun (from the original sentence) + verb + as + positive form of adjective + as + subject of the original sentence. Here, "the most valuable" is changed to "as valuable as," and the sentence is restructured to convey the same meaning in a positive degree.