关于现在完成时否定式she hasn't forgoten the correct answer yet 为什么这里是用forgoten,而不是原形.

关于现在完成时否定式she hasn't forgoten the correct answer yet 为什么这里是用forgoten,而不是原形. He has a pen.的否定式（除了He doesn't have a pen) 即有没有He hasn't a pen.的说法 must的否定式是musn't还是mustn't have to的否定式是不是don't.have.to a祈使句的否定式可说成Don't be . 否定式中没有动词用not还是don't can（否定式） should（否定式） will的否定式`` will的否定式 some否定式是什么 she's done well,hasn't she? 为什么must的否定式要用can’t或者needn’t?may要用can’t 英语现在完成时练习Mother has cooked the dinner and cleaned the kitchen.怎么变成否定式和疑问式? 为什么must be的否定式是can't be而不是mustn't be Amy often forgets to close the window when she leaves home.改为否定式祈使句 Amy often forgets to close the window when she leaves home.改为否定式祈使句 like的否定式like(否定式）____