my brother came in and the stranger was taken by surprise I

这句语序很乱.
写成这样就好了：
My brother came in and
the stranger was taken by surprise.
I caught hold of the man.
那个陌生人,在我兄弟进来的时候,被吓了一跳.然后就被我抓住了.
写成三句单句就是：
My brother came in.我兄弟进来了.
The stranger was taken by surprise.那个陌生人被吓到了.
I caught hold of the man. 我抓住了那个人.
be taken by surprise
冷不防被…吓一跳,出其不意地攻击
catch hold of
抓住, 握住