现在完成时里的否定句后面的动词不改为原型吗?He hasn't heard a lot of Mr.Li

现在完成时里的否定句后面的动词不改为原型吗?He hasn't heard a lot of Mr.Li 否定句后面接动词原形?never后接动词的原型吗?第三人称单数时 when后面是不是不能用现在完成时啊?还有助动词后面的动词要原型 he needs a lot of money(改为否定句) Mr Li is a worker.改为否定句 英语的句型转换 Mr Li lived here three years ago.( 改为现在完成时)Mr Li ( ) 现在进行式的句子改为否定句 动词要变原型还是不变啊》? we have heard of a disney cruise改为否定句 I have had a lot of chicken wings (改为否定句) I haven't had----- They have intersting books.改为否定句 Jim has a lot of homework t MUST后面的动词是原型吗 Mr Smith had a lot of money.改为同义句