我认为它在我父母的房间里用英文怎么说

"It" 指的是您在房间里发现的东西。在这种情况下，您可以说 "I think it's in my parents' room."

"It" 是英语中的主语代词，用来指代前面提到过的事物或人。例如：

"I saw it on the table." (我在桌子上看到了它。)
"Can you give it to me?" (你能给我吗？)

"Think" 是英语中的动词，意思是 "to have an opinion or bepef that something is true or pkely to be true." 例如：

"I think it's going to rain later." (我认为今天晚些时候会下雨。)
"I don't think that's a good idea." (我不认为那是个好主意。)

"In" 是介词，表示在某个地点之内。例如：

"The book is in the bag." (书在包里。)
"I'm in the car." (我在车里。)

"My parents' room" 是名词短语，表示我父母的房间。