幸亏我早起，否则会迟到了。

Xìngkuī wǒ zǎoqǐ, fǒuzé huì chídàole.

Fortunately, I woke up early, otherwise I would have been late.

幸亏你提醒我，否则我会忘记带钱包。

Xìngkuī nǐ tíxǐng wǒ, fǒuzé wǒ huì wàngjì dài qiánbāo.

Thanks to your reminder, otherwise I would have forgotten to bring my wallet.

幸亏我及时报名，否则就没有机会了。

Xìngkuī wǒ jíshí bàomíng, fǒuzé jiù méiyǒu jīhuìle.

Fortunately, I registered in time, otherwise I wouldn't have had the opportunity.