Watashi wa country-jin desu I am nationality.
Watashi wa isha desu meaning. The noun followed by a particle wa is the topic of a statement or a question. Watashi wa tsukareta desu meaning. Often used by weeaboos when mocking a whining acquaintance or nearby personnel.
And imasu refers to. Watashi wa Maiku Mirā desu.
N1 wa N2 desu ka. Watashi wa gakusei desu. I am 29 years old.
Toshi wa 29-sai ni juu kyu-sai desu. Its an easy language. Desu indicates judgment or assertion.
Watashi wa kokugo no kyoushi desu. I was a doctor. On the other hand the Japanese term wa represents the topic of the sentence being stated.
I am not a high school student. Chichi mo kugatsu umare desu. Watashi wa isha deshita.