Which of the following sentences is correct ?

Question

Accepted Answer

Option 2, "Jack has been trying to get his book published for ages but so far no one has said 'Yes'," is correct because it uses the present perfect continuous tense ("has been trying") appropriately to describe an action that started in the past and is still continuing. The phrase "for ages" indicates a duration of time, making the present perfect continuous the most suitable tense. The rest of the sentence is grammatically sound and logically consistent.

Here's why the other options are incorrect:

*   **Option 1: "At last! I've been solving the problem."** While grammatically *possible*, it's not the *best* choice. "At last!" implies a completed action. The present perfect continuous ("I've been solving") suggests an ongoing process. A more natural sentence would be "At last! I've solved the problem." or "I've finally been able to solve the problem!". The use of "At last!" clashes with the continuous aspect.

*   **Option 3: "My friend has been buying a new car. It looks great."** The present perfect continuous ("has been buying") implies that the process of buying the car is still ongoing. While technically possible (e.g., if the friend is still negotiating the price or waiting for delivery), it's more likely that the friend *bought* the car. The simple present perfect ("My friend has bought a new car") would be more appropriate in most contexts, as it emphasizes the completed action of purchasing the car. The second sentence "It looks great" implies the car is already in possession.

*   **Option 4: "I've never been understanding maths."** The verb "understand" is a stative verb, meaning it describes a state of being rather than an action. Stative verbs are generally not used in continuous tenses. The correct sentence would be "I've never understood maths." The present perfect simple is used to describe a state that has been true up to the present.