哇,IT IS A BIG QUESTION。sometimes it depends the speaker's attitude....FOR EXAMPLE,不得了,that MEANS it is a big news..it makes us shocked...超级 means super. it is same as english.过分,refers to you do something wrong to me.i can not accept...like if you lie to me,i can say ,you are very 过分。as for 了不得,it is unusual....超夸张 defines it is unblievable...it is so different...that's all. hope can help me! i am a chinese, i will go to NY next year.NOW i am looking for a foreign to improve my spoken english