be serious about do还是doing?

be serious about do还是doing? be serious about doing sth. be care about 加do 还是ding?talk about 加do还是doing? be serious with/about 用（be)serious about think about doing还是do 还是什么 Please be serious about what you do.这句话中的serious什么意思? be crazy about 后面接doing sth,还是to do sth还是另外的 be serious about diong about.=be serious about sth. be about to do和be about doing 区别 be worried doing sth 还是be worried about doing sth be prepare do 还是be prepare doing