So far к какому времяни относится в языке? и вообще это слово ?

Да, это маркёр present perfect (обычно в отрицании) we haven't had any problems so far - пока что проблем не было i have been to 15 countries so far - я объездил 15 стран (на сегодняшний момент) общий смысл -  на данный момент

Charlie Bucket is a poor boy who lives near the Wonka Candy Company. He lives with his mother, his father (who works in a toothpaste factory), and his four bedridden grandparents. The company's owner, Willy Wonka, has for long closed access to his factory due to problems concerning industrial espionage that ultimately led him to fire all his employees, among them Charlie's Grandpa Joe. One day, Wonka informs the world of a contest, in which five Golden Tickets have been placed in five random Wonka Bars worldwide, and the winners will be given a full tour of the factory as well as a lifetime supply of chocolate, while one ticket holder will be given a special prize at the end of the tour.

Andy wallace has invited me to dinner while i interview him, so i meet him at eight o'clock, not at some charming local cafe or new japanese sushi bar, but at the back of the local supermarket beside the rubbish bins. 'have a tuna sandwich - they look delicious. and here's some almond croissants. fantastic' andy is a 'freegan' - pronounced /fri: gan/. he can perfectly well afford to buy food, but he chooses not to as a protest against our shamefully wasteful consumer society. 'this food is perfectly good and could have fed at least thirty people. according to a recent government survey, up to a third of the food we buy is thrown away, which in the uk amounts to a staggering £420 of wasted food per adult per year. lord haskins, the government's food and farming adviser, said, 'we are very greedy when we go and shop. our eyes are bigger than our stomachs in homes and in restaurants.' however, according to andy, the government itself is simply not doing enough in the first place to combat this incredible waste.the food redistribution charity, 'fareshare', specialises in collecting high-quality food before it is past its sell-by date, and taking it to the many charities who feed our country's poor and vulnerable. if we were able to redistribute as muc food as they do in the states, we could give out at least 50,000 tonnes of free food a year. if only our governmentsupported these food redistribution charities, along with forcing our food businesses to cooperate, then it would be possible.freegans feel strongly that our wasteful consumerist culture with all its endless producing, packaging, buying and binning, is entirely to blame for the destruction of the planet. 'i just never buy food,' he explains. for many people, freeganism will be a step too far, but it serves to highlight the shameful waste of millions of tons of food every year in the uk.