Some songs,had always been the single cycles.
可以,但是少冠词,单复不一致.谢谢~ had been不是要加动词的吗?had always been 一直是，可以当动词用后面加名词We have always been good students.

 single cycles作为泛指,可以不加the吗？

如果用复数，当然可以