هل نقول
He is American.
ولا
He is an American.
ام كلاهما صحيح
وهل هناك فرق ام لا

I think
He is American, is more acceptable sentence as you have mentioned his nationality ,but in the second PHRASE not a SENTENCE the meaning has not been completed yet .......... We could say ''''' He is an American spy or thug .

Thanks Mr Abou Besho .






Cross My Heart , I respect you .

شكرا جزيلا لحضرتك عزيزى مستر وائل اليك منى كل احترام وتقدير
من خلال القاموس نجد ان كلمه American مثلها مثل كل الكلمات المشتقه لتدل على الجنسيه تكون اما اسم او صفه لذا اذا استخدمت صفه لا يمكن وضع اداه نكره امامها الا اذا تبعت باسم اما اذا جاءت بدون اسم فلا يمكن وضع اداه نكره امامها اما اذا استخدمت كاسم يمكن وضع an امامها لانها هنا اسم وليست صفه لذا نقول :
He is American.
He is an American boy.
He is an American.(boy-man-woman) ويمكن ان تحذف الكلمات التى بين الاقواس وتبقى American اسم وليس صفه
·Amer·i·can(-mr-kn)
adj.
1. Of or relating to the United States of America or its people, language, or culture.
2. Of or relating to North or South America, the West Indies, or the Western Hemisphere.
3. Of or relating to any of the Native American peoples.
4. Indigenous to North or South America. Used of plants and animals.

Adj.

1.
American - of or relating to the United States of America or its people or language or culture; "American citizens"; "American English"; "the American dream"




2.
American - of or relating to or characteristic of the continents and islands of the Americas; "the American hemisphere"; "American flora and fauna"






n.
1. A native or inhabitant of America.
2. A citizen of the United States.
3. American English.

Noun

1.
American - a native or inhabitant of the United States





Asian American (http://www.thefreedictionary.com/Asian+American) - an American who is of Asian descent
French the potatoes
cut (e.g, beans) lengthwise in preparation for cooking
cut (e.g, beans) lengthwise in preparatioi am an americann for cooking
1.




2. Ad Council : I am an American (2001-Present) (http://www.adcouncil.org/default.aspx?id=141)
3. ‏ (http://www.google.com.eg/url?q=http://www.adcouncil.org/default.aspx%3Fid%3D61&sa=X&ei=3ToqTKOCDNn9sQbSxJ2LAw&ved=0CBUQ6QUoAQ&usg=AFQjCNGA1_-67ZizUbDNHcmxMBmKXmK5gg) - نسخة مخبأة (http://webcache.googleusercontent.com/search?q=cache:5RDViQNfXcMJ:www.adcouncil.org/default.aspx%3Fid%3D141+i+am+an+american&cd=3&hl=ar&ct=clnk&gl=eg) - مماثلة (http://www.google.com.eg/search?hl=ar&rlz=1T4GGLL_enEG380EG380&q=related:www.adcouncil.org/default.aspx%3Fid%3D141+i+am++an++american&sa=X&ei=3ToqTKOCDNn9sQbSxJ2LAw&ved=0CBgQHzAC)
4. Purdue Bands -- "I am an American" (http://www.purdue.edu/bands/aamb/iamanamericanbg.html)
5. Amazon.com: I am an American: A True Story of Japanese (http://www.amazon.com/American-Japanese-Internment-Childrens-Classics/dp/0517885514)
6. ‏ (http://www.google.com.eg/url?q=http://www.amazon.com/Ethnic-National-Biographies-Memoirs-Books/b%3Fie%3DUTF8%26node%3D2365&sa=X&ei=3ToqTKOCDNn9sQbSxJ2LAw&ved=0CD4Q6QUoAQ&usg=AFQjCNEstBkycs1BqNyuO4A-V2z6tuXrkg) › Japanese‏ (http://www.google.com.eg/url?q=http://www.amazon.com/Japanese-Ethnic-National-Books/b%3Fie%3DUTF8%26node%3D2372&sa=X&ei=3ToqTKOCDNn9sQbSxJ2LAw&ved=0CD8Q6QUoAg&usg=AFQjCNFJ25y0mOYr2k2sI1Bvvhygmq4Vcg) - نسخة مخبأة (http://webcache.googleusercontent.com/search?q=cache:7By4QUS-IcMJ:www.amazon.com/American-Japanese-Internment-Childrens-Classics/dp/0517885514+i+am+an+american&cd=12&hl=ar&ct=clnk&gl=eg) - مماثلة (http://www.google.com.eg/search?hl=ar&rlz=1T4GGLL_enEG380EG380&q=related:www.amazon.com/American-Japanese-Internment-Childrens-Classics/dp/0517885514+i+am++an++american&sa=X&ei=3ToqTKOCDNn9sQbSxJ2LAw&ved=0CEIQHzAL)
7. I am an American - نتيجة البحث في كتب G (http://books.google.com.eg/books?id=OtVbHMMJ6gIC&printsec=frontcover&dq=i+am++an++american&source=bl&ots=wkZi1XSrM0&sig=ip3Mi9FM2Q-AuETNC1VveDQE8ZY&hl=ar&ei=3ToqTKOCDNn9sQbSxJ2LAw&sa=X&oi=book_result&ct=result&resnum=13&ved=0CEUQ6AEwDA)
8. America I Am: The African American Imprint (http://www.americaiam.org/)
9. -America I AM, The African American Imprinمماثلة (http://www.google.com.eg/search?hl=ar&rlz=1T4GGLL_enEG380EG380&q=related:www.iamamerica.com/+%E2%80%8F+i+am++american&sa=X&ei=lDsqTMT1J42ksQbokKzEBA&ved=0CB8QHzAC)
10. نتائج الفيديو لـ ‏ i am american (http://www.google.com.eg/search?q=%E2%80%8F+i+am++american&hl=ar&rlz=1T4GGLL_enEG380EG380&source=univ&tbs=vid:1&tbo=u&ei=lDsqTMT1J42ksQbokKzEBA&sa=X&oi=video_result_group&ct=title&resnum=4&ved=0CDMQqwQwAw)
t · FA

Thank youuuuuuuuuuuuuuuuu

شكراااااااااا