The disease spread throughout the country.
请问throughout在这里是介词吗?spread是不及物动词吗?
throughout可以作介词和副词,在网友的这个句子中是介词,它的宾语是 the country。副词后面不能接宾语。下面句中的throughout是副词:
This apple is rotten throughout.
She remained silent throughout. spread没有接宾语,当然是不及物动词。