幸亏我提前看了天气预报，今天没下雨。
xìngkuī wǒ tíqián kànle tiānqì yùbào ， jīntiān méi xiàyǔ 。
Fortunately, I checked the weather forecast in advance, and it didn't rain today.
幸亏你提醒我，否则我会忘记会议的时间。
xìngkuī nǐ tíxǐng wǒ ， fǒuzé wǒ huì wàngjì huìyì de shíjiān 。
Luckily, you reminded me; otherwise, I would have forgotten the meeting time.
幸亏我们提前订了票，不然今天就买不到了。
xìngkuī wǒmen tíqián dìngle piào ， bùrán jīntiān jiù mǎi búdào le 。
Fortunately, we booked the tickets in advance; otherwise, we wouldn't be able to buy them today.