Abstract: Although there have always been controversies around the importance of two levels of phonology (segmental and suprasegmental) in language teaching history, today there is a general consensus that both of these should be taken into consideration to reach the goals of pronunciation instruction. However, time shortage is a factor that forces the teachers to set priorities and be selective of materials that have more crucial role in understanding and being understood than others both in segmental and suprasegmental level. The touchstone of this review is to examine the degree to which suprasegmentals affect comprehensibility. This work concludes that suprasegmentals play an important and crucial role in pronunciation teaching.