The key answer of exercise 2

a)

1. I'll look for clues that will help me.
2. I'm always watching videos, I'm always looking for opportunities
3. She keeps on calling me.
4. I'm inclined to be very analytical/l'm happy to take risks with language
5. I have a tendency to focus on the grammar
6. As a rule, I'm happy to take risks
7. nine times out of ten I'll just know if something is wrong
8. I didn't use to have the confidence to speak
9. I would spend hours studying grammar rules
10. I was always looking for new ways to
11. I kept making mistakes
12. I was forever making mistakes.
13. I tended to get frustrated

b)

1. He'll spend hours on the computer.
2. They would complain all the time.
3. She'll disagree with everything you say.

c)

The stress is on a different word in the two versions. In sentences 2, 4 and 6 the stress is on will / would and the effect is to make the speaker sound irritated or annoyed about the habit.

d)

Sentence 1