Below are very good sentences and a list of useful sentences via links
If you wish to be fluent in English speaking and you are tyro in its use, you must learn first of all some frequently used English Sentences. These sentences are used every where and can give you a lot of confidence in the direction of learning Spoken English. 
Practice these sentences every day at home and make them the part of you day-to-day conversation. So get ready for some very important sentences of daily use.
Important English Sentences for daily use -
- As you please - जैसी आपकी मर्जी।
- Oh, I am sorry. I have got a bit late - माफ़ कीजिएगा , मुझे थोड़ी देर हो गई।
- I beg your pardon - माफ़ कीजिएगा ।
- Would you please speak slowly ? - क्या आप थोड़ा धीरे बोलेंगे ?
- It's all yours - इसे अपनी ही चीज़ समझें।
- That's so kind of you - आपकी बड़ी कृपा है।
- Sorry for the inconvenience - आपको कष्ट हुआ इसके लिए क्षमा करें।
- Glad/Nice to meet you - आपसे मिल कर बड़ी ख़ुशी हुई।
- I will try my level best - मैं पूरा प्रयास करूँगा।
- Please help yourself - कृपया अपने आप लीजिए।
- Well done, dear - शाबाश प्यारे।
- Of Course ! - बेशक़ !
- By God's Grace ! - प्रभु कृपा से !
- Wonderful ! - अदभुत ! आपने तो कमाल कर दिया!
- How disgraceful ! - कितने अपमान की है !
- Good heavens ! - हे प्रभु !
- How dare you ! - तुम्हारी हिम्मत कैसे हुई !
- Hurry up ! - जल्दी करो।
- Rest assured - भरोसा रखो।
- Long time no see - बहुत दिनों से आपको नहीं देखा।
- Doesn't matter - कोई बात नहीं।
- Touch wood ! - कहीं नजर ना लगे।
- Watch out ! - देख के। संभल के।
- Come what may ! - अब चाहे जो हो !
- What a bother ! - क्या मुसीबत है !
- What nonsense ! क्या बकवास है!
- Is it ? - क्या सच ?
- How disgusting ! - छि:
- Not the least ! - थोड़ा भी नहीं !
- Yes, by all means - हाँ हाँ जरूर !
- Go up - ऊपर जाओ ।
- Go down - नीचे जाओ ।
- Get Off - उतर जाओ।
- Do come - जरूर आना
- Let it be - चलो जाने दो।
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We shall update this post with more Frequently used English Sentences. So keep coming.