5 sentences

1. 这期培训班共有五十名学员。

   zhè qī péi​xùn​bān gòng yǒu wǔ​shí míng xué​yuán.

   There are fifty trainees in this training class.

   Source: Dong Chinese Dictionary

2. 参加这次培训班让我收获很大。

   cān​jiā zhè cì péi​xùn​bān ràng wǒ shōu​huò hěn dà.

   I gained a lot from attending this training course.

   Source: Dong Chinese Dictionary

3. 他报名参加了一个英语培训班。

   tā bào​míng cān​jiā le yī gè Yīng​yǔ péi​xùn​bān.

   He signed up for an English training course.

   Source: Dong Chinese Dictionary

4. 很多上班族选择在周末参加培训班充电。

   hěn​duō shàng​bān​zú xuǎn​zé zài zhōu​mò cān​jiā péi​xùn​bān chōng​diàn.

   Many office workers choose to attend training classes on weekends to upgrade their skills.

   Source: Dong Chinese Dictionary

5. 他在这个暑假报名参加了中文口语培训班。

   tā zài zhè gè shǔ​jià bào​míng cān​jiā le Zhōng​wén kǒu​yǔ péi​xùn​bān.

   He signed up for a Chinese speaking training class this summer vacation.

   Source: Dong Chinese Dictionary