should sth to do 这句话对吗

It cost sb to do sth,这句话对吗? what should I do to do sth 这种句型对吗 what we should do is to persistence这句话对吗 He did whatever he could to do sth.frightened children这句话对吗. spend sth to do sth对吗 是should to do sth 还是 should do sth? should to do sth还是should do sth Do you think what i should do 这句话对吗? See these ,what should we do?这句话对吗? suggest to sb to do sth对吗? what should i do what i should do?这句话对吗 you should know what you should do well this time,这句话对吗,后面DO