Could is a modal verb. It is used with the base form of a verb. Could is sometimes considered to be the past form of can, but in this dictionary the two words are dealt with separately. could 为情态动词，与动词原形连用。could 有时被视为 can 的过去式，但本词典对这两个词条分别列词解释。
相关句子
Could you tell me about it the old lady readily agreed.
