Преобразуйте предложения в past perfect и present perfect. 1.it presents the mechanism for survival. 2.they are able to carry out the task of production. 3.it is possible to group these structures into four broad categories. 4.these methods are based on tradition. 5.a son follows in the footsteps of his father and uses the same skills and tools. 6.the distribution problem is solved in a similar manner. 7.they receive shares according to an ancient custom. 8.tradition plays some part in economical processes.

Past perfect обозначу как    p1 present perfect - p2 1. p1   -  it   had presented the mechanism for survival for years.p2 - it has   just  presented the mechanism for survival.2.p1 -  they had been  able to carry out the task of production by monday. p2-  they has just been  able to carry out the task of production.  3. p1 -  it had been  possible to group these structures into four broad categories by that time. p2 -  it has just  been  possible to group these structures into four broad categories.  4. p1 -  these methods had been based on tradition for a long time. p2 - these methods has already  been based on tradition. 5. p1 -  a son had followed  in the footsteps of his father and used the same skills and tools by the time he was   20 years old.   p2 -  a son has already followed    in the footsteps of his father and used the same skills and tools.  6. p1 -  the distribution problem had been solved in a similar manner  for a long time. p2 -  the distribution problem has already been  solved in a similar manner.  7. p1 -  they had  received shares according to an ancient custom for 5 years.  p2 -  they have just  received shares according to an ancient custom.  8. p1 -  tradition had  played some part in economical processes.  p2  -  tradition has already  played some part in economical processes. 

My hobby is drawing hobbies make our life more colouful and they keep us occupied in our leisure time my favourite hobby is drawing. the best presents on my parents’ and grandparents’ birthdays were also my drawings. of course i was pleased and quite proud of my works. since then this hobby has become a very important part of my life. drawing brings me real satisfaction. it is my own little world. and i hope one day it will help me to focus on my goal and become a graphic designer. мое хобби - рисование хобби нашей жизни больше красок и занимают нас в свободное время мое любимое хобби - рисование лучшие подарки на дни рождения моих родителей и бабушки с дедушкой были конечно же рисунки разумеется я гордилась(ся) своими рисунками. с тех пор это хобби стало частью моей жизни. рисование доставляет мне истинное удовольствие. это мой маленький мир. и я надеюсь что однажды это мне стать графическим дизайнером.

Уменя огромная семья. моя мама любит читать книги, в то время как мой брат обычно играет на компьютере на выходных. ей также нравится поп-музыка, когда я предпочитаю рок. у нас есть кот, а моей сестре нравятся слоны. и она всегда говорит, что хочет одного как питомца, тем самым заставляя нашу семью смеяться. мы обычно кушаем на обед сыр и лимонад по пятницам, любимая часть обеда моей младшей сестры—клубника как десерт. это не дословный перевод, так что автору вопроса придется немного поисправлять)