The question asks us to choose the most appropriate verb form to complete the sentence: "With your new credit card, you can ______ up to Rs. 20,000 in a day."

The blank follows the word "can". The word "can" is a modal verb. Modal verbs are a type of auxiliary verb that express possibility, ability, permission, or obligation.

An important rule in English grammar is that modal verbs are usually followed by the base form of the main verb. The base form is the simplest form of the verb, without any endings like -s, -ed, or -ing, and without "to" before it (in this context).

Analyzing Verb Forms and Modal Verbs

Let's look at the options provided and their forms:

• withdraws: This is the third person singular present tense form of the verb (e.g., "He withdraws money").
• withdraw: This is the base form of the verb.
• withdrew: This is the simple past tense form of the verb (e.g., "Yesterday, I withdrew money").
• withdrawn: This is the past participle form of the verb, often used with helping verbs like "have," "has," or "had" (e.g., "I have withdrawn money").

Applying the Rule for 'Can'

Since the sentence uses the modal verb "can", the verb that follows it must be in its base form. Comparing the options to the base form "withdraw", we find that option 2, "withdraw", is the correct base form.

Therefore, the completed sentence should be: "With your new credit card, you can withdraw up to Rs. 20,000 in a day."

Why Other Options Are Incorrect

• "withdraws" is incorrect because it is the third person singular present tense form, not the base form required after "can".
• "withdrew" is incorrect because it is the past tense form, not the base form.
• "withdrawn" is incorrect because it is the past participle form, not the base form.

The rule that modal verbs are followed by the base form applies consistently. Some common modal verbs include:

• can
• could
• will
• would
• shall
• should
• may
• might
• must

For example:

• You can go now. (not can goes, can went, can gone)
• They should study harder. (not should studies, should studied, should studying)
• We will leave tomorrow. (not will leaves, will left, will leaving)

Revision Table: Modal Verbs and Verb Forms

Additional Information: Base Form vs. Infinitive

While modal verbs are followed by the base form, it's worth noting the difference between the base form and the infinitive. The infinitive is typically "to + base form" (e.g., to withdraw). However, after modal verbs, we use the base form without "to". This is sometimes called the "bare infinitive".

Consider other verbs that might use the infinitive:

• I want to withdraw money. (Uses infinitive "to withdraw")
• They decided to leave. (Uses infinitive "to leave")

But with modals:

• You can withdraw money. (Uses base form "withdraw")
• They should leave now. (Uses base form "leave")

This rule is fundamental for using modal verbs correctly in English sentences.