The use of formulaic sequences in English as a Foreign Language (EFL) lessons plays an integral role in language teaching and learning, but it seems still widely neglected in the Thai school context. To call attention to this issue, this study aims at identifying formulaic sequences used in a Thai primary school. The data were taken from three native English teachers in their young learners' EFL lessons, and were analysed with the use of corpus software to identify the formulaic sequences used according to their functions within the various situations in the lessons.The findings reveal that multiple formulaic sequences were used throughout the lessons for various reasons but always in a specific context during the course of the lessons. This study has created a potentially useful list of formulaic sequences, including their functions and situations they could be used in. We hope that this list could benefit non-native English EFL teachers who teach young learners in their own lessons.