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Q

Medium 1 Mark

English Tenses

What is the key difference in signal words between Future Continuous and Future Perfect?

A 'At' signals future perfect; 'by' signals future continuous.

B 'At' (ongoing at a point) signals future continuous; 'by' (completed before a point) signals future perfect.

C Both use 'by' as a signal.

D Both use 'at' as a signal.

'At 6pm' → action in progress → future continuous. 'By 6pm' → action completed before 6pm → future perfect.

Reference: English Grammar Guide , Page 10

At = in progress at that time (continuous). By = completed before that time (perfect).