12. At- A point in space where something is happening.Ex: I´ll see you at home.
13. In- Something takes place inside (not outside).Ex: He was playing in the park.
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15. At- Use it with ‘arrive’; to show the person/thing the action is aimed at. Ex: We arrived at the school.
16. To- Use it with verbs of movement (come, go, travel, ..)Ex: He ran to my house yestarday.
17. Into- Use it with verbs that mean ‘to move from outside to inside’. Ex: I got into the classroom.
18. Towards- Means moving or pointing in a particular direction. Ex: She heard something towards her.
19. At the end- Final point or part. Ex: At the end of the exam, we all were confused.
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21. It is use in routine/ regular repeated actions, time clauses, permanent situations, timetables, programmes, facts and states.Ex: 1- I don´t think the exam will be difficult.2- I always have breakfast before I go to school.
29. To the same degree (as… as)Ex: Living on a houseboat could be as exciting as living on a tent.
30. To a lower degree (with less + than and the leastEx: I´m less keen on living in a bedsit than a flat.
31. Not as… as (describing a small difference)Ex: Chace Crawford is not as famous as Robert Pattinson.
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37. Past Continuous (was/ were + verb + ing)Ex: I was playing in the park with my friends.
38. Past Perfect (had + past participle)Ex: When I arrived to school I realized I had forgotten my study guide.
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40. To introduce an action which is going on while something else happens.Ex: 1- While I was cooking, I was listening to music.2- As I get older I have more stress.3- When I was in elementary school, everything was easier.
43. They refer to the beginning of a situation, to make contrast with something different that happens later.Ex: 1- At first I was very excited about the trip, but now not a lot.
49. Ought to/ should (obligation)Ex: 1- You shouldn´t shout to your mom!
50. Must/ Have to (strong obligation and neccesity)Ex: 1- You must use your uniform everyday.2- I have to study or I will fail the test.
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52. To talk about past habits and states that do not occur now or no longer exist.Ex: 1- I used to play with dollswhen I was little.2- I used to teach on PISI, but not anymore.