It seems as if从句怎么用

It seems as if 虚拟语气
It seems as if you were the boss here.(but actually,you are not.)
seem like+n./ V-ing,"看起来像"
It seems like years since I last saw you.自从我上次见到你以后,好像是过了好几年.
Those cards seemed like so many little flags dotted about the schoolroom.那些卡片好像许多面小旗点缀着教室.