1、No matter how much I drank coffee, I did not sleep. 2、“有什么吗?” we need to know what it's earlier and later,then we can understand this sentence. In this sentence, the word "什么“ means "something". 3、In some situation, we should use the word ”吗“ to indicate we are asking a question. for example: 你有手机。You have a phone。 你有手机吗？Do you have a phone ? sorry, my english is not very well ,but i hope this can help you.

1.多少 in Chinese means how many or how much,but here it means no matter how much,the whole sentence should be 不管我喝多少咖啡也没失眠过，the word 不管 can be omitted. 2 and 3.There should be other sentences before or after this question,and it should be asked like 有什么呢？The question word 吗 cannot use together with the specific question words such as 什么，哪儿，谁，etc.

1 - In the first sentence 多少 means how much . I guess 多少 is used in asking question. ( correct me if i am wrong ) so it should be > 我和很多咖啡也没失眠过. i drunk too many coffee and also haven't sleep yet. - for 2 and 3 有什么事吗？ What's the matter ? 有什么吗？ （i really don't know what is the direct answer , may be it is 有什么？- what have ? )

1. The rough translation of this is: "I drink too much coffee did not sleep." The correct sentence in English would be: "I drank too much coffee and did not sleep." 2.This means: "What is it?" I cannot answer number three but I hope this helps you! ^-^