Holy Molyadicionou o comentário 9 years ago
They HAVE been... Has - это третье лицо - he/she/it
они спорят уже два часа и еще не пришли ни к какому решению
They've been arguing already for two hours and have not come to any decision yet.
they has been arguing for 2 hours and have no idea to solve this problem
They HAVE been... Has - это третье лицо - he/she/it
Have no idea HOW to solve the problem