你怎么刚说了又不算了的英文

you just made a promise and now you've gone back on it

• 你:    you
• 怎么:    how
• 刚:    hard; rigid; firm; ...
• 说:    try to persuade
• 了:    finish; complete; ...
• 不:    a block of wood
• 算了:    let it go at that; ...