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Elementary English Course
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Special cases of the -ed forms: Follow these rules when there is a consonant after a vowel (stop, ban, open, offer...) If there is a consonant after a stressed vowel at the end of the word, double the consonant. For example, stop – stopped , ban - banned , swap – swapped. If the vowel is not stressed, we do not double it: open - opened (Here the stress is on 'o', not the 'e'.) offer - offered ( here the stress is on 'o', not the 'e'.) In British English we double the last l even though the last vowel is not stressed. Here are some examples: travel – travelled , cancel – cancelled, level – levelled, marvel – marvelled. Do the vocabulary building exercise for the next interactive activity.