sb be to blame for sth

blame sb for sth=blame sth on be to blame for be thankful to sb for (doing) sth be critical for sb to do sth be sth for sb award sth.to sb.award sb.sth.admire sb.for sth.It be obvious be greatful for sb to sth 还是 be greatful to sb for sth be sth to sb sth to sb 还是 sth for sb sth to sb 和sth for sb be important to sb.与It is important for sb.to do sth.与 sth.i be hard for sb to do sth是什么意思?