1) I want the same food please.
in this situation you can just say "same with him": 跟他一样
(跟他相同 or 与他相同 means the same thing, but 相同 is a very formal word)
2) Hey look! Do you see that car? My friend has the same car.
看到那辆车了吗？我朋友有辆一样的。
3) I'm the same age as him.
我和他一样大。
4) Did you see how he climbed the tree?? I want to climb the same way.
看到他怎么爬树了吗？我也要那样爬。
(用相同的/同样的/一样的方式爬 is as good as a machine translation, don't translate English into Chinese word by word)
5) My notebook is as the same as my friend's.
我的笔记本跟我朋友的一样。
Which one?! 同一 or 一样 or 同 or 相同 or 同样?!
1) I want the same food please. 给我来份一样的!(食物省略。相同的/同样的也可以) 或者同样给我来一份！（同样此处为adv. 没有“的”）
2) Hey look! Do you see that car? My friend has the same car. 嘿，看到那辆车了吗？我朋友也有一辆相同的/一样的（一样的为adj.省略车）。
3) I'm the same age as him. 我和他年龄一样/我和他同龄。the same ..as 和..一样
4) Did you see how he climbed the tree?? I want to climb the same way. 看到他怎样爬树了吗？我也想用同样的/一样的/相同的方式爬。
5) My notebook is as the same as my friend's. 我的作文和我朋友的一样。as the same as :和....一样
