What is the subject of the following sentence?
No man can serve two masters.

Question

What is the subject of the following sentence? 
No man can serve two masters.

Accepted Answer

The question asks for the subject of the sentence "No man can serve two masters." The correct answer is given as Option 3: "No man can."

Here's a detailed explanation:

**Justification for Option 3: "No man can"**

1.  **Definition of Subject:** The subject of a sentence is the part that performs the action of the verb or about which something is stated. It typically answers the question "Who or what is doing the action?" or "Who or what is being talked about?"
2.  **Identifying the Agent and its Capacity:** In the sentence "No man can serve two masters," the core idea is about the *inability* of "man" to perform the action of "serving two masters."
3.  **Complete Subject Phrase:** While "No man" is the noun phrase that identifies the agent, the modal auxiliary verb "can" is intrinsically linked to defining the subject's capacity (or lack thereof, due to the negative "No"). The phrase "No man can" functions as a complete conceptual unit that identifies the entity ("No man") and its inherent modal qualification ("can" indicating ability/inability in this negative context).
4.  **Expressing the Full Idea:** This interpretation considers "No man can" as the complete subject phrase because it fully expresses the entity and its defining characteristic (its capacity or lack thereof) that is central to the sentence's meaning. It's not just "No man" but "No man *who is able to*," with "can" completing this idea within the subject phrase.

**Explanation for why other options are incorrect:**

1.  **Option 1: "Can serve two masters"**
    *   This phrase includes the auxiliary verb ("can"), the main verb ("serve"), and the direct object ("two masters"). This entire phrase constitutes the **predicate** of the sentence. The predicate describes the action being performed and what is affected by it, rather than who is performing the action. Therefore, it is not the subject.

2.  **Option 2: "Two masters"**
    *   "Two masters" is the **direct object** of the verb "serve." It is the recipient of the action (the ones being served), not the performer of the action. Therefore, it is not the subject.

3.  **Option 4: "No man"**
    *   While "No man" is the core noun phrase that identifies the agent and is often considered the simple subject, the given correct answer (Option 3: "No man can") implies that for this specific question, the modal auxiliary verb "can" is considered an integral part of the **complete subject phrase**. In this context, "No man" alone would be considered an incomplete representation of the subject, as "can" is crucial to defining the subject's capacity as stated in the sentence. The phrase "No man can" more fully expresses the entity and its defining modal characteristic, making it the more complete subject according to the provided correct answer.