keep在单词中k需要大写还是小写

keep在单词中k需要小写，在句首要大写。

Keep the baby warm.

别把婴儿冻着。

Mary keeps a diary.

玛丽天天记日记。

The police are keeping / standing guard over the house.

警察正派人守护着这幢房子。

He always keeps to his promises.

他总是说话算数的。

Please keep quiet.

请保持安静。