咩情況先有雙字母出現

通常個verb尾二的字母係響音(aeiou), 就會有雙字母出現:

e.g.
shop --> shopping
stop --> stopped
cut --> cutting
chat --> chatting


不過, 如果連尾三都係響音, 就不會有雙字母出現:

e.g.
seal --> sealed
hear --> hearing
read --> reading


另外, 個verb最尾的字母係"y" 或 "w", 因為發出的音是"i" 和 "u", 所以不會有雙字母出現:

e.g.
draw --> drawing
play --> playing
say --> saying