Question

我打算3年后结婚.later ,after 还是 in

Answer 1

将来时里,表示一段时间之后只能用介词in.

三天后我要去上海

I will go to Shanghai in 3 days （正确)

I will go to Shanghai 3 days later (错误）

我打算3年后结婚.

I plan to get married three years later. (一般现在时）

I'm going to get married in three years. （一般将来时）

Three days later he got to Beijing．＝After three days he got to Beijing．

他三天以后到达了北京.

这两个句子都是对的,一般过去时态两个都可以用.