Question

be likely to do sth和 likely do sth 有什么区别嘛．

Answer 1

be likely to do sth 译为有可能做某事.
be likely to do 像做一些事
likely作形容词.

例句：
It is likely to rain. 好像快要下雨了
That 's likely to be a tough sell.这款产品很可能不好卖。
I don't like to be in deep. Don't urge me to do so.
我不想陷得很深，不要极力劝我去这样做。

likely do sth .译为大概..
likely做副词. 主要用在most,或者very的后面.
例句：
They'll very likely come by car.
他们很有可能会开车来.

Answer 2

1.be likely to do sth
likely作形容词.译为有可能做某事.
eg:It is likely to rain.
好像快要下雨了.

2.likely do sth .
likely做副词.译为大概..
主要用在most,或者very.后面.
eg:They'll very likely come by car.
他们很有可能会开车来.

Answer 3

熊猫君君正解