use of 了 in past tense
when speaking in past tense when should you add 了 after the verb and when should you add it to the end of the sentence?

thanks

Question

use of 了 in past tense
when speaking in past tense when should you add 了 after the verb and when should you add it to the end of the sentence?

thanks

Answer

after verb --- past tense
他  喝了  咖啡。

at the end of the sentence --- indication of quality
今天  太  冷  了。

Answer

for example:①你吃饭了吗？        我刚好吃（过）了。②你去哪里了？     我去公园了=我去了公园。③比赛怎样？      唉，我输了。