我认为我的家庭很幸福用英语怎么说

"I think my family is very happy" 用英语说就是 "I believe my family is very happy."

来源： "I think" 是表示主观意见的常用词汇，"my family is very happy" 是表示家庭幸福的常用词汇。

例句：

"I think my family is very happy because we spend a lot of time together."
"我认为我的家庭很幸福，因为我们在一起的时间很多。"
"I believe my family is very happy because we always support and care for each other."
"我相信我的家庭很幸福，因为我们总是互相支持和关心。"