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This letter of recommendation is to certify that the prospect student, …, is highly eligible to pursue his career as an electrical engineers at your University or Company. I have known him since his undergraduate studies.

During that period, he took the courses "Operating Systems" with me which he got the B mark among his classmates and he exhibited excellent performance.

As his competence in English skills is concerned, he has excellent abilities in written and oral English as well as comprehending lectures or presentation, presented in English.

He has an outstanding potential to deal with research work and surmount its challenging perfectly, making him absolutely qualified in underlined research works and topics.
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Comments  (Page 2) 
enoonI'm pretty sure grammarfreak is not a native English speaker
It all depends on how one defines "native speaker", You are correct, I wasn't born in the US. Also true, I was raised in California, educated in technology field, naturalized, and have lived and worked in the Bay Area for 30 years. So am I a native? You be the judge. I'd like to think so. In fact I believe I speak and write better than the average Americans. But that is not the reason for this reply. For a letter of recommendation for application acceptance, this one was lacking the conviction and credential. The context, even though clear and understood, the tone and construction did not achieve the intended purpose as originally written. But that's just my opinion. If I were to write a recommendation for someone, I would state my name, my title / credential, relationship to the person whom you recommend, and your personal or working relationship with him, and your tribute to the person. That's the format I would use. I must emphasize. Resume, recommendation and writing with personal feelings are unique to the person who is doing the writing. That being said, it must be convincing and sound genuine.
This letter of recommendation is to certify (I don't believe the writer is ceritifying anything, merely recommending, I would use a different word) that the prospective student, …, is highly eligible (qualified might be a stronger choice), to pursue his career as an electrical engineers at your University or Company. I have known him since his undergraduate studies. (How long ago? When?)

During that period, he took the courses "Operating Systems" with me in which he got the earned a B mark among his classmates (this entire phrase is awkward though.) and he exhibited excellent performance.

As his competence in English skills is concerned, Concerning his competency in English, he has excellent abilities in written and oral spoken English as well as comprehending lectures or presentations, presented in English.

He has an outstanding potential to deal with research work and surmount its challenging perfectly (this does not make sense), making him absolutely qualified in underlined (??? what is this) research works and topics.

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I did the best I could with the letter as written; however, I think I would agree with Grammarfreak that it is not the best format nor the most fervent call to action.
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KJinCali79During that period, he took the courses "Operating Systems" with me in which he got the earned a B mark among his classmates (this entire phrase is awkward though.) and he exhibited excellent performance.
Precisely my point! I am relieved that I am not the only oneEmotion: wink
Thank you very much dear KJinCali79.

Regarding your last comment I changed the last paragraph. Do you think it looks better now?

He has outstanding potential to deal with research work and overcome posed challenges perfectly, making him absolutely qualified in underlined research works and topics.
I kind of messed that up. Listen to these guys.
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