Canceled or Cancelled are both considered correct by the American Heritage and Merriam Webster dictionaries.
present: cancel past: cancelled (British English), canceled (American English)
All three words, 'Spell past tense' are correctly spelled.
You spell the past tense of settle like this: Settled
The past tense is discussed.
The past tense is murmured.
present: cancel past: cancelled (British English), canceled (American English)
have in past tense is had
The past tense of have is had.
All three words, 'Spell past tense' are correctly spelled.
You spell the past tense of settle like this: Settled
The past tense is benefited.
The past tense is coasted.
The past tense is traveled.
The past tense is roped.
The past tense is hoorayed.
The past tense is gassed.
The past tense is paddled.