我好像忘记了关空调。

Wǒ hǎoxiàng wàngjì le guān kōngtiáo.

It seems I forgot to turn off the air conditioner.

天好像快下雨了。

Tiān hǎoxiàng kuài xiàyǔ le.

It seems like it will rain soon.

他好像不太高兴。

Tā hǎoxiàng bú tài gāoxìng.

He seems not very happy.