Question

be+busy+doing=be+( )+(

Answer 1

e busy doing sth =be busy with sth =doing sth busily =bi busily doing sth

呃,其实呢,就是一个busy的形容词和副词的变换,

busy后跟忙的事情时用with,其他的用法就是个正常形容词和副词的用法了……