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Preposition: "For"
'For' का प्रयोग

For Purpose, Duration, and Beneficiaries.

Concept: "For" is used to show the reason (purpose) of an action, who it is done for (beneficiary), or how long it lasts (duration).
("For" का प्रयोग 'के लिए', 'कारण', या 'समय अवधि' बताने के लिए किया जाता है।)

1. Purpose / Reason (उद्देश्य / कारण - के लिए)

Used to say why you are doing something.

English Sentence Hindi Meaning
I am going for a walk. मैं सैर के लिए जा रहा हूँ।
He asked for help. उसने मदद के लिए पूछा।
She studies for knowledge. वह ज्ञान के लिए पढ़ती है।

2. Duration of Time (समय अवधि - से)

Used in Perfect Continuous Tenses to show "how long" an action has been happening (Period of Time).

English Sentence Hindi Meaning
I have been waiting for 2 hours. मैं 2 घंटे से इंतजार कर रहा हूँ।
He lived here for 10 years. वह यहाँ 10 साल तक रहा।
We played for a long time. हमने लंबे समय तक खेला।

3. Beneficiary (किसके लिए)

Used to show who receives something.

Difference: Since vs For

Since (Point of Time) For (Period of Time)
Since Monday For 2 days
Since 2010 For 10 years
Since 5 PM For 3 hours