want to do sth ,seem to do sth ,help to do sth,need to do st

want to do sth ,seem to do sth ,help to do sth,need to do st need sth to do sth need sth to do help to do sth want to do Sth sb seem to do sth seem to do sth是什么意思? seem to do sth 中文 need sth与need to do sth don not have to do sth.don not need to do sth.need not do st do sth to do need sth to do sth 咋造句?