在梦里喊叫用英语可以用 "to call out in a dream" 来表达。这个短语的来源可以追溯到古英语时期，"call" 是一个动词，意思是 "呼唤"，"out" 是副词，意思是 "向外"，"in a dream" 是介词短语，意思是 "在梦里"。因此，"to call out in a dream" 的整体意思就是 "在梦里呼唤"。

下面是一些英文例句以及其中文翻译，希望对您有帮助：

She called out in a dream for her mother, but no one answered. 她在梦里喊妈妈，但没有人回应。
He called out in a dream for help, but his voice was muffled. 他在梦里呼救，但声音被压低了。
I called out in a dream for someone to save me, but I woke up before anyone could come to my rescue. 我在梦里呼救，希望有人救我，但我在有人来救我之前醒了。