PAST TENSE
- simple past tense : to express an action in the past. Example :There is more information posted on the Net than any library in the world ( line 4 ).
- past continuous tense : to mention something that happened at a particular time or over a period of time. Example : was, were,...ing
- past perfect tense : talks about the past in the past. Example : had eaten.
- past perfect continuous : show that something started in the past and continued up until another time in the past.
- simple present tense : for habitual actions, instructions, directions, describe feelings.
- present continuous tense :
- to show an action being done at the moment.
- to show a future action.
- to show a habitual action. It is used with words like 'always', 'after', 'constantly'.
- to refer to an action that is repeated many times.
- example : Workers everywhere today are handling volumes of which threaten to engulf them ( line 34 ).
- show a past action where the time is not mentioned.
- refers to an action that has been completed recently.
- refers to a past action that continuing to the present.
- example : When twenty - four - year - old Chen from Taipei created the Chernobyl computer virus with the aim to humiliate and take revenge on incompletent anti - virus software producer, disaster struck a number of countries in Asia and the Middle - East.
- an action that has just stopped / recently stopped.
- talk about an action that started in the past and stopped recently.
- simple future tense
- to express a future action
- to refer to a future action in conditional sentence
- to give commands or provide explanations
- in the passive form
- when an action takes place at the particular time in the future.
- to ask for something politely.
- to show an action that has not been planned.
- express action in the future before another action in the future.
- this is the past in the future.
- talk about a long action before some point on the future.
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