在英语中，当一个人经常哭泣时，可以用下列表达方式来形容这种状态：

Crying frequently or easily: 易泪的、容易哭的

例句：

She is a very emotional person and tends to get teary-eyed easily. 她是一个非常感性的人，容易流泪。
He is prone to crying and gets upset easily. 他容易哭泣，很容易生气。
Being emotionally unstable or prone to crying: 情绪不稳定、容易哭泣

例句：

She has been emotionally unstable since the breakup and has been crying a lot. 自从分手后，她的情绪就不稳定，常常哭泣。
He has been feepng down lately and has been prone to crying. 最近他感觉不太好，容易哭泣。
Crying easily or frequently as a result of a particular situation or event: 因为某些特殊情况或事件而容易或经常哭泣

例句：

She has been crying a lot lately because of the stress of her job. 最近她因为工作压力而经常哭泣。
He has been crying easily since his mother passed away. 自从他的母亲去世后，他就容易哭泣。

注意：在英语中，"cry" 是一个不及物动词，意思是"哭泣"。因此，当描述一个人"经常哭"时，通常需要在"cry"前面加上表示频率的副词，如"frequently"或"easily"。