"Because" 是一个连词，用于引导原因状语从句，表示“因为”。它可以连接前后两个句子，其中前一句是结果，后一句是原因。例如：
Because后接句子：
I didn't buy it because it was too expensive.
They are here because of us.
He is called Mitch, because his name is Mitchell.
Because of后接名词、代词、动名词或从句：
I didn't buy it because of its high price.
Life was harder then because neither of us had a job.
The game was postponed because of rain.
建议
在使用 "because" 和 "because of" 时，需要注意它们的用法和区别：
"because" 后接句子，强调直接原因。
"because of" 后接名词、代词、动名词或从句，强调原因的具体内容或对象。
根据具体的语境和需要表达的原因类型，选择合适的词来引导从句或短语。