I AM UNDERSTAND 有无语法错误

I AM UNDERSTAND 有无语法错误 I am always here to understand I am not a child understand love How don't I understand am in I am willing to contribute everything I have to you.这句话语法有无错误.麻烦可以改进一下使得它更加本土. I am afraid I did not make myself __(understand). You don't understand how much heart broken i am. I am not an English all do not understand But I am not understand very much中文意思? do not understand English?You do not understand English?Silly you ,I am Your brotherLearning you I am missing you语法有错吗 i am a boy 是什么语法? just like i am 语法有误? 语法填空i am staying here three___mounths i am a highschool student 语法对吗 I understand 英译汉i understand what you said but i am not sure i know what you mean l understand还是l am understand