3 sentences

1. 因为天气恶劣，开幕式不得不延期。

   yīn​wèi tiān​qì è​liè, kāi​mù​shì bù​dé​bù yán​qī.

   The opening ceremony had to be postponed due to bad weather.

   Source: Dong Chinese Dictionary

2. 关于是否应该延期，会议室里爆发了激烈的争论。

   guān​yú shì​fǒu yīng​gāi yán​qī, huì​yì​shì lǐ bào​fā le jī​liè de zhēng​lùn.

   A heated debate broke out in the conference room over whether to postpone.

   Source: Dong Chinese Dictionary

3. 他的护照已经延期过一次了。

   tā de hù​zhào yǐ​jīng yán​qī guo yī cì le.

   His passport has already been extended once.

   Source: Dong Chinese Dictionary