English Grammar: Filling the Blank Correctly

The question asks us to choose the most appropriate word to complete the sentence "Have you seen Mohan ________ ?". This sentence uses the present perfect tense ("Have you seen"). The present perfect tense is often used to talk about experiences or actions that happened at some unspecified time in the past, or actions that started in the past and continue up to the present. We need an adverb that fits this context.

Analyzing the Options for "Have you seen Mohan ________ ?"

• lately: This word means "recently". It refers to an unspecified time in the recent past. The present perfect tense is commonly used with adverbs like 'lately', 'recently', 'ever', 'never', 'already', 'yet', 'just', etc., when talking about experiences or actions connected to the present moment. Therefore, "Have you seen Mohan lately?" is grammatically correct and makes sense, asking if you have seen him at any point in the recent past.
• yesterday: This refers to a specific point in the past (the day before today). When we talk about a specific completed action at a specific time in the past, we use the simple past tense. For example, "Did you see Mohan yesterday?". Using 'yesterday' with the present perfect tense is generally incorrect in standard English.
• lastly: This word means "in the last place" or "finally" when talking about a sequence. For example, "First, we went to the park, and lastly, we had dinner." It does not fit the context of asking if someone has been seen recently.
• late: This word can be an adjective or an adverb meaning "after the usual or expected time". While it's an adverb of time, it doesn't fit the meaning required for the sentence "Have you seen Mohan ________ ?". It doesn't ask if Mohan was seen arriving after the expected time; it asks if he has been seen recently.

Determining the Most Appropriate Adverb

Based on the analysis, only the adverb 'lately' correctly fits the present perfect tense structure ("Have you seen") and provides a sensible meaning to the question, asking about seeing Mohan at some point in the recent past.

Summary of Adverb Usage with Present Perfect

Certain adverbs are commonly used with the present perfect tense to indicate time or frequency related to an unspecified past or an action continuing to the present. Examples include:

• lately
• recently
• ever
• never
• just
• already
• yet
• for (duration)
• since (starting point)

Adverbs referring to specific completed times in the past (like 'yesterday', 'last week', 'in 2010') are typically used with the simple past tense.

Conclusion on the Fill-in-the-Blank Sentence

To correctly complete the sentence "Have you seen Mohan ________ ?", we need an adverb compatible with the present perfect tense that indicates a recent, unspecified time. The word 'lately' fulfills this requirement.

Therefore, the most appropriate choice to fill the blank space is 'lately'. The completed sentence is "Have you seen Mohan lately?".

Revision Table: Present Perfect Tense and Adverbs

Additional Information: Understanding Adverbs of Time

Adverbs of time tell us when an action happened, how long it lasted, or how often it happened. They can be single words (like 'lately', 'yesterday') or phrases (like 'last week', 'since 2020').

• Specific past time adverbs: These specify exactly when something happened in the past (e.g., yesterday, last night, three days ago, in 1990). They are typically used with past tenses like the simple past.
• Unspecified or recent past time adverbs: These refer to a time in the recent past without giving a specific point (e.g., lately, recently). They are often used with the present perfect tense.
• Sequence adverbs: These indicate the order of events (e.g., first, then, next, finally, lastly). 'Lastly' falls into this category.

Choosing the correct adverb depends heavily on the tense used in the sentence and the specific meaning you want to convey regarding the timing of the action.