well first of all. i seem to have a lot of problems with coming up with sentences or forming sentences in general. for example when i'm talking to americans or whatever i usually don't really know what to say. but i fully understand them!! and when i'm about to say something. it's almost as if i didn't know any words.. like. i don't know any other english words other than the basic stuff. how can i improve?? please help me. thank you