"sentence" 这个词在英语中 是可数名词。当它作为名词时，意思包括“句子”、“命题”、“宣判”或“判决”。例如：

1. She wrote a long sentence.

2. The judge made a sentence.

3. There are many sentences in this book.

此外，"sentence" 还可以作为及物动词使用，意为“判决”或“宣判”。例如：

1. The court sentenced him to prison.

当 "sentence" 作为复数形式时，其形式为 "sentences"。例如：

1. She wrote several sentences.

2. There are many sentences in the text.

综上所述，"sentence" 作为名词和动词时都是可数的，并且具有复数形式 "sentences"。