+0
I still have problems with my english, so Do these sentence sound ok? Are they complete sentences? thank you for your help

For years, U.S companies have been brought farm workers, mostly from Mexico and Central America, because of their farming experience.

Bernice Zamora points out that while farm workers have to ask themselves every day how they are going to feed their children, the gabacho can earn from $ 20,000 to 30,000 a year (312).

They work from eight to twelve hours a day under all weather conditions.
+0
Hello Pilita

#2 is fine. For the others, you could say:

1. For years, U.S companies have brought farm workers into the country mostly from Mexico and Central America, because of their farming experience.

3. They work from eight to twelve hours a day under all weather conditions.

– This is ok; but 'in all kinds of weather' is probably more idiomatic.

MrP
Comments  
Thank you for your suggestions!!