in fact等于短语in reality,in practice,as a matter of fact
例句
1.
I didn't fail the exam; in fact I did rather well!
我没有考不及格，事实上，我考得不错！
2.
In fact, things could get worse in the short run.
事实上，事情在短期内可能会变得更加糟糕。
3.
The theory seems to have no basis in fact.
这一理论似乎没有事实根据。
in fact是介词短语。in fact和actually在特定情况下可以互换。in fact一般放于句首，actually是副词，一般放于动词前。
actually
英 ['æktʃuəli] 美 ['æktʃuəli]
adv. 实际上；事实上；竟然（表示惊讶）
Some patients actually got worse after receiving the treatment.
有些病人在接受治疗后，病情事实上反而严重了。
近义词
truth
英 [truːθ] 美 [truːθ]
n. 事实；真理；真实；真相
The truth verified the allegations.
事实证明了这些说法
