be busy doing sth和be busy with sth 的区别是什么？

1.
be
busy
with
sth
，with后面加事情：忙于某事
。侧重于动作，sth是名词。
He
is
busy
with
his
homework
.
2.
be
busy
doing
sth
，doing
后加动词进行式：忙着做某事。侧重于状态。
He
is
busy
doing
his
homework
.

be
busy
doing
sth,
doing
sth是现在分词短语作伴随状语.
be
busy可以看成是复合动词.
be
busy
with
sth,
是with引导的介词短语作形容词busy的宾语.

be
busy
doing
sth侧重于动作
be
busy
with
sth
侧重于状态
意思都一样，可以互换。
he
is
busy
doing
homework.=
he
is
busy
with
homework.

be
busy
doing
sth和be
busy
with
sth的区别为：指代不同、用法不同、侧重点不同
一、指代不同
1、be
busy
doing
sth：忙于做某事。
2、be
busy
with
sth：忙于某事。
二、用法不同
1、be
busy
doing
sth：busy用作形容词的基本意思是“忙的”，通常指人经常或暂时埋头于一项工作，含有“热衷于”的意味。busy作“繁忙的，热闹的”解时可修饰物或事物。
2、be
busy
with
sth：busy既可用作及物动词，也可用作不及物动词。用作及物动词时，一般接oneself作宾语，常常表示“使自己忙于某事”。
三、侧重点不同
1、be
busy
doing
sth：侧重于动作。
2、be
busy
with
sth：侧重于状态。