Conditional sentences
The conditional sentences are sometimes confusing for learners of English.
Watch out:
1) Which type of the conditional sentences is used?
2) Where is the if-clause (e.g. at the beginning or at the end of the conditional sentence)?
There are three types of the if-clauses.
| type | condition |
|---|---|
| I | condition possible to fulfill |
| II | condition in theory possible to fulfill |
| III | condition not possible to fulfill (too late) |
Form
| type | if clause | main clause |
|---|---|---|
| I | Simple Present | will-future (or Modal + infinitive) |
| II | Simple Past | would + infinitive * |
| III | Past Perfect | would + have + past participle * |
Examples (if-clause at the beginning)
| type | if clause | main clause |
|---|---|---|
| I | If I study, | I will pass the exam. |
| II | If I studied, | I would pass the exam. |
| III | If I had studied, | I would have passed the exam. |
Examples (if-clause at the end)
| type | main clause | if-clause |
|---|---|---|
| I | I will pass the exam | if I study. |
| II | I would pass the exam | if I studied. |
| III | I would have passed the exam | if I had studied. |
Examples (affirmative and negative sentences)
| type | Examples | ||
|---|---|---|---|
| long forms | short/contracted forms | ||
| I | + | If I study, I will pass the exam. | If I study, I'll pass the exam. |
| - | If I study, I will not fail the exam. If I do not study, I will fail the exam. | If I study, I won't fail the exam. If I don't study, I'll fail the exam. | |
| II | + | If I studied, I would pass the exam. | If I studied, I'd pass the exam. |
| - | If I studied, I would not fail the exam. If I did not study, I would fail the exam. | If I studied, I wouldn't fail the exam. If I didn't study, I'd fail the exam. | |
| III | + | If I had studied, I would have passed the exam. | If I'd studied, I'd have passed the exam. |
| - | If I had studied, I would not have failedthe exam. If I had not studied, I would have failedthe exam. | If I'd studied, I wouldn't have failed the exam. If I hadn't studied, I'd have failed the exam. | |
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Some and Any
The words some and any are used for countable and uncountable nouns. In general, we could say that some means a few / a little and any means none in negative clauses or a few / a little in questions.
Positive Clauses
In positive clauses, we usually use some.
- Example:
- I have bought some bread.
- I have bought some apples.
Negative Clauses
In negative clauses, we use any. Note, however, that any alone is not a negative - it must be not ... any
- Example:
- I have not bought any bread.
- I have not bought any apples.
Questions
In questions, we usually use any.
- Example:
- Have you bought any bread?
- Have you bought any apples?
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Verb Tense Review and Exercises
Here is a helpful table with the tenses, a quick explanation and some helpful words/phrases associated with each of them.
.
Past | Present | Future | |
| Simple | An action that ended at a point in the past. | An action that exists , is usual, or is repeated. | A plan for future action. |
| cooked | cook / cooks | will cook | |
| (time clue)* | e.g. He cooked yesterday. | e.g. He cooks dinner every Friday. | e.g. He will cook tomorrow. |
| Progressive be + main verb +ing | An action was happening (past progressive) when another action happened (simple past). | An action that is happening now. | An action that will be happening over time, in the future, when something else happens. |
| was / were cooking | am / is / are cooking | will be cooking | |
| (time clue)* | e.g. He was cooking when the phone rang. | e.g. He is cooking now. | e.g. He will be cooking when you come. |
| Perfect have + main verb | An action that ended before another action or time in the past. | An action that happened at an unspecified time in the past. | An action that will end before another action or time in the future. |
| had cooked | has / have cooked | will have cooked | |
| (time clue)* | e.g. He had cooked the dinner when the phone rang. | e.g. He has cooked many meals. | e.g. He will have cooked dinner by the time you come. |
| Perfect Progressive have + be + main verb + ing | An action that happened over time, in the past, before another time or action in the past. | An action occurring over time that started in the past and continues into the present. | An action occurring over time, in the future, before another action or time in the future. |
| had been cooking | has / have been cooking | will have been cooking | |
| (time clue)* | e.g. He had been cooking for a long time before he took lessons. | e.g. He has been cooking for over an hour. | e.g. He will have been cooking all day by the time she gets home. |
*Time clues: these are words that give some information about when an action occurs. Some examples are:
yesterday every day tomorrow while now | simple past simple present simple future past progressive present progressive |
| There are many words that are time clues; some can be used to indicate a number of tenses, for instance that something happened in the past or that it will happen in the future. If you learn to recognize these time clues, you will find them very helpful. Note that some time clues can be used with more than one verb tense and also that this table is not a complete listing of all the time clues that can be used with all of the tenses |
CHART—TIME CLUES AND VERB TENSE
| Past | Present | Future | |
| Simple | Simple Past | Simple Present | Simple Future |
yesterday last year/ month/ etc. before for five weeks/days/etc. one year/ month ago | every morning / day / etc. always usually frequently sometimes | tomorrow tonight next week/month/etc. soon in the future | |
| Progressive | Past Progressive | Present Progressive | Future progressive |
| while when | now right now this week/minute/etc. | when after as soon as before | |
| Perfect | Past Perfect | Present Perfect | Future Perfect |
| before already by the time until then/last week/etc. after | until now since ever never many times/ weeks/years/etc. for three hours/ minutes/etc/ | by the time you go (somewhere) by the time you do (something) already | |
| Perfect Progressive | Past Perfect progressive | Present Perfect Progressive | Future Perfect Progressive |
| before for one week/hour/etc. since | for the past year/ month/ etc. for the last 2 months/ weeks/etc. up to now for 6 weeks/hours/etc. since | by the time for ten days/weeks/etc. by |
Adjectives
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