yuán lái hǎi zhè me dà, dà dào ràng rén wàng le zì jǐ de fán nǎo.
So the sea is this big, so big it makes you forget your own worries.
chú fáng lǐ méi yǒu niú nǎi, zuó tiān jiù yòng wán le, wǒ wàng le mǎi.
There was no milk in the kitchen. It had run out yesterday and I'd forgotten to buy more.
wǒ xià bān huí dào jiā mén kǒu cái fā xiàn, yào shi wàng zài bàn gōng shì le.
I only realised when I got to my front door after work: I'd left my keys at the office.