Computacion

1.1 Simple present
We use this for: thing that are true in general (Many people live in the heart of the city), the laws of science and nature (In winter some trees lose all their leaves), how often something happens (Linda cleans her house twice a week). The simple present is used with the stative verbs on the right. They appear only in simple form. (Believe, belong, hate, hear, know, like,mean, need, prefer, remember, seem, suppose, understand). Do and does are used to form question and negative form (Does she share a bedroom with her sister? I don’t like living near this busy road. It’s very noisy.
1.2 Present continuous
We use this for action that: Are in progress at the time of speaking (Michael Is painting the kitchen at the moment), are in progress around the time ofspeaking (they are saving up to buy a new carpet).
Remember: We don’t use the present continuous with stative verbs
1.3 Adverbs of frequency
Adverbs of frequency are used to say how often something happens. They come before the main verb, but after the verb be (We always leave the light on at night, I am never late for school)
Here are some common adverbs of frequency (always, never, often,rarely, seldom, sometimes, usually)
1.4 Tag questions
Tag questions are short question at the end of an affirmative or negative sentence. We use tag questions when we want: someone to agree with what we are saying (They lived in Denver, didn’t they?) to make sure that what we are saying is right (he won’t make the curtains, will he?, They are formed with modal and auxiliary verbs (you cansend a fax, can’t you?)
Remember: When have is used as a main verb, we use the verb do to make the tag question.
2.1 Simple past
We use this for: A state or completed action in the past (She passed her driving test last month), when the time is important (we sold the house two years ago), a series of completed actions in the past (He sat down, took out a pen and started writing.
Did is used toform question and negative form (did you send them a postcard when you were on vacation? They didn’t watch tv last night?)
Spelling rules
1.0 Most regular verb in the simple past are formed by adding –ed. Verbs ending in –e add d. (look – looked, save – saved)
2a. Regular verbs ending in consonant – vowel- consonant double the consonant before the ending –ed when the stress is on the finalsyllable. (stop – stopped, prefer – preferred)
2b. when the stress is not on the last syllable, the final consonant is not doubled. (Visit – visited)
3a. Verbs ending in a consonant and –y change the –y to an –I before the ending –ed. (Carry – carried, play – played)
3b. When the verb ends in a vowel and –y, the –y doesn’t change
Note: that these verbs do not follow the spelling rules. For alist of irregular verbs, (Lay – laid, pay – paid, say – said)
2.2 Past continuous
We use this: For actions that were in progress at a certain time in the past (we were playing cards at 10 o’clock last night, Amy was writing a letter when I arrived), For two or more actions that were in progress at the same time in the past (I was washing the floor and Jack was working in the garden), for anaction that was in progress in the past and was interrupted by another action (I was writing a letter when my boss arrived), to describe thing in the past (the reporters were asking the star questions)
The past continuous often follow as and while (the lights went out while she was tying)
Remember: We don’t use the past continuous with stative verb
3.1 Future with will
We use this to. Makepredictions, promises and threats (I think an astronaut will walk on Mars in the next twenty-five years), It is often used with verbs like think and believe, as well as phrases like I am sure… ( I am sure you will like the new CD), offer to do something for someone (I will give you a lift to the concert), ask someone to do something (will you turn the music down, please?), make a sudden decision (“what...