The correct translation of "সে এমনভাবে কথা বলে মনে হয় সব জানে।" is "He talks as if he knew everything." This sentence conveys the idea that the person speaks in a manner that gives the impression of knowing everything, even though it may not be true. The key here is the use of the subjunctive mood in English, which is required when expressing unreal or hypothetical situations.

• The phrase “as if” is used to indicate comparison or hypothetical resemblance. In this context, it shows that his manner of speaking resembles someone who knows everything, though it is not necessarily the case.

• The use of “knew” instead of “knows” is important because it reflects a contrary-to-fact or unreal condition. Although he doesn’t actually know everything, his speech gives that impression, which is why the past tense subjunctive form “knew” is used.

• Other options are incorrect for the following reasons:

  • “He talks like he knew everything” is grammatically awkward and less precise in expressing the hypothetical sense. “Like” is generally used for literal similarity, while “as if” better conveys unreality or assumption.

  • “He talks after knowing everything” changes the meaning entirely, suggesting he speaks only after learning everything, which is not implied in the Bengali sentence.

  • “He talks like he knows everything” is grammatically understandable, but it doesn’t accurately reflect the hypothetical nuance intended in the original sentence; it sounds more like a direct statement rather than an impression or assumption.

• The structure “talks as if + past tense verb” is a standard way in English to describe behavior that suggests something that is not necessarily true. Similar examples include:

  • “She behaves as if she were the boss.”

  • “He spends money as if he had no worries.”

In essence, the translation “He talks as if he knew everything” perfectly captures the subtlety of the original Bengali sentence, reflecting both the impression created by the person’s speech and the hypothetical or unreal condition implied. It balances grammatical correctness with the nuanced meaning of the original sentence.