1 It's exciting for me to learn that i can come to visit my friend in phu yen next month ->i am so excited about learning that i can come to visit my friend in phu yen next month-S + V + so + adjective/ adverb + that + S + V;excited about+Ving

2 those children need to be taught about how vietnam has transformed itself ->it is necessary for those childen to be taught about how vietnam has transformed itself- It + be + adj +(for sb) + to V

3she was so rude to shout at his face in the department store ->it was  rude of her to shout as his face in the department store

  4 he was so brave that he could tell her what he thought about her(it)->it was brave of him to tell her what he thought about her