2)
- We have learned a lot about computers at school.
- I have read about tablets and I have used my friend's.
- My dad has spent a lot of money on gadgets.
- My mum has had three jobs in her life.
- My brother has bought a new net book.
- My friend has started writing a blog.
- Students from my class have won five English competitions.
- I have written a lot of emails in my life.
- Mark has uploaded his photos to the Internet. Let's look at them.
3)
- She has won a lot of money and is going to spend it on holidays.
- He has finished his homework and he can relax now.
- He has lost his mobile phone and he doesn't know where it is.
- They have bought a lot of clothes and haven't got any money left.
- He has passed all his exams and his parents are very pleased with him.
- They have spent all their money on money on computer games.
- She has sent an email to her friend and is waiting for her friend to write back.
- I have started a new job. It's hard work but I like it.
Объяснение:
Глаголы делятся на правильные и неправильные. У правильных во второй и третьей форме прошедшего времени будет иметься окончание -ed. В свою очередь неправильные глаголы не подчиняются этому правилу, на то они и неправильные. Каждый глагол имеет свои формы, которые просто нужно запомнить. В конце учебника или в интернете можно найти таблицу с самыми частоупотребляемыми из них.
Построение такой временной формы глагола как Present Perfect состоит из: have + 3 форма глагола.
^-^