在英语中,“not”是一个否定词,它用于否定句子中的动词、形容词、副词或其他词语。当“not”与动词一起使用时,动词的形式取决于句子的时态和语态。以下是几种常见的用法:
基本形式:在简单现在时和简单过去时中,“not”通常与动词原形一起使用。例如:
I am not happy. (现在时)
He did not go to the party. (过去时)
进行时态:在进行时态中,“not”通常与“be动词+现在分词”一起使用。例如:
She is not studying right now.
They were not playing football at that time.
完成时态:在完成时态中,“not”可以与“have/has/had + not + 过去分词”一起使用。例如:
I have not finished my homework.
They had not decided where to go.
助动词:当句子中有助动词(如“can”,“could”,“may”,“might”,“must”,“should”,“would”等)时,“not”通常放在助动词之后。例如:
She cannot speak French.
They shouldn't have done that.
情态动词:当句子中有情态动词时(如“must”,“ought to”,“used to”等),“not”通常放在情态动词之后。例如:
You mustn't forget your keys.
He usedn't to like coffee.
总之,“not”后面的动词形式取决于句子的时态、语态和上下文。在使用时,请确保动词的形式与句子的其他部分保持一致。