help相关短语：
help oneself（to）自用；自取所需
with the help of 在…的帮助下
help sb with sth 帮某人干某事
help with 帮忙某人做…
help each other 互相帮助
need help 需要帮助
can't help 禁不住，忍不住；不得不
ask for help 寻求帮助；求助；请求帮助
help yourself 请自便
help out 帮助…摆脱困难
help on 鼓励；促进
help sb.（to）do sth.帮助某人做某事
be of some/no/much help to sb.对某人有些/没有/很有帮助