1. Which (不只一樣東西選擇)
e.g. : Which colour do you like best?
Red or Green
2. What (只有一樣)
e.g. : What is your favourite seasons?
I like Summer.
以上,只是個人愚見!如有錯誤,請指教!
"What 可以多於一樣; Which 只可以一樣" Well...I beg to differ. I think 'which' is used when referring to specified choices; 'what' is used when choices are not explicitly specified. It really depends on the context.