
When do we use ‘can’? What is the past form of ‘can’? When do we use ‘could’?
How to use the passive structure in news reports? What verbs are generally used in news reports using the passive voice?
What is the structure of present perfect tense? When do we use the present perfect tense? What is the difference between ‘for’ and ‘since’? What is the difference between ‘ever’ and ‘never’? What is the difference between ‘gone’ and ‘been’?
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