天色变暗了.看上去好像要下雨了 请问这句话要怎么译成英文?还有as though一般放在句中什么位置.

The sky is becoming dark.It seems that it's going to rain.as though一般放在句中的中间 as though=好象e.g.He treats his elder sister as though she were a stranger.他待他姊姊如陌生人.