Hello,Heather: 我给小李打了电话了=我给小李打了电话 我给小李打了电话了：强调的是已经完成了打电话这件事。 我给小李打了电话：强调的是打电话时说的内容。 我给小李电话了和我给了小李打电话都是错误的。 can u understand?

我给小李打了电话了. 我给小李打电话了 我给小李打了电话 我给了小李打电话？（这一句是错误的，没人这么讲，其余全部正确！） Double 了 indicates a continuous action, it is still ongoing. 这种说法没有理论根据。也不适用于这句话，并不能理解成我打电话这事还在一直继续。 我给小李打电话了。表示“给小李打电话这件事完成了” 我给小李打了电话。强调的是“打”： 如果有人问：你给小李打电话了吗？ 可以回答：我给小李打电话了。 如果表达：我今天做了…… 　　　　　我今天早上起来，吃了早饭，看了会儿书，还给小李打了电话。 而如果有人问：你还没给小李打电话吗？ 你就可以回答：我给小李打了电话了。因此，这句话强调的是：不是没有打，而是打了。而电话后面的了，更多的是一种语气。和前面的了不完全相同。

了 after a verb indicated a completed action. 了 at the end of a sentence indicates a change in situation. In English, this is like "have been verbing" (Present Perfect Continuous). 了 at the end of a sentence can also mean "about to do something if certain verbs are paired with it, such as 要...了， 快...了，快要...了.

I see your question got some good answers. suggest you think about the sentence : "你学汉语学了多长时间了" so you can be more familiar with 了

1. Why is there 了 twice here if I only called Little Li once? 我给小李打了电话了. Ok, The first 了here means: have done someting, while the second one means the samething.but,most time, you can change the scond 了 to 啦。so，我给小李打了电话了.actually means :我给小李打了电话啦. 2. Would it also be correct to say 我给小李打电话了 or 我给小李打了电话 or 我给了小李打电话 the first two sentences are both right. and means exactly the same thing. 我给了小李打电话--if you say it to native chinese people, they can understand you, but it sounds a little bit strange, kinda of England-Chiniese.