Он закончил первую главу диссертаци

Он закончил первую главу диссертации и пишет вторую. Он работает над диссертацией уже 2 года.

Результаты (английский) 1:

He finished the first chapter of the thesis and write a second. He is working on a dissertation already 2 years.

Результаты (английский) 2:

He finished the first chapter of the thesis and wrote the second. He is working on his thesis for 2 years.

Результаты (английский) 3:

he finished the first chapter of the thesis, and writes the second. he is working on the thesis for two years.