这时候外面下起了大雨。

Zhè shíhou wàimian xiàqǐ le dàyǔ.

At this moment, it started to rain heavily outside.

这时候你应该好好休息。

Zhè shíhou nǐ yīnggāi hǎohāo xiūxi.

At this time, you should have a good rest.

这时候要是有一杯热茶就好了。

Zhè shíhou yàoshi yǒu yì bēi rèchá jiù hǎo le.

It would be great to have a cup of hot tea at this moment.