If you are asking about how to write sentences like "the things THAT I bought", "the food THAT I ate ate", "the person THAT is sitting next to me", "the person who is wearing red shoes" and so on you do it like this. Basically, you flip it round, so that they do this: "the things THAT I bought" - the "I bought things" - 我買的東西 "the food THAT I ate ate" - the "I ate" things - 我吃的東西 "the person THAT is sitting next to me" - the "sitting next to me" person - 坐著在我旁邊的人 "the person WHO is wearing red shoes" - the "wearing red shoes" person - 穿著紅色鞋子的人 To construct the sentences "the presents that she gave me", you do the same thing 1) Flip the sentence round - the "she gave me" present - 她給我的禮物 More examples 每一個人有他/她喜歡的東西、不喜歡的東西 - Everybody has things that they like and things that they don't like 這本書很看看得懂啊，我不認識的漢字太多了 - This book is hard to read, there are too many characters that I don't like 我不喜歡跟一個我不太認識的人説話呀！ - I don't really like talking to people that I don't know so well! 你知道嗎，真的很難學一個你就不想學的東西啊 - You know, it's really hard to study something that you just don't want to learn! 山上房子的旁邊有一條河 - There is a lake next to the house that is on the top of the mountain 我喜歡做飯的原因就是，我可以吃我想吃的食物 - The reason I like cooking is that I can eat (the) things that I want to eat PS: the most common way to say "thanks for you help“ is 謝謝你/您的幫助 Laurence

One way to thank someone else for their help is: 谢谢您的帮忙。

Just say 谢谢。谢谢 can be used in any situation after receiving a gift, or any help. If you want to mention the object, you may add the name of object to 谢谢, such as 谢谢你的花，谢谢你的礼物，谢谢你的帮忙。