The paper uses Systemic Functional Linguistics (henceforth SFL) to conduct a transitivity analysis of the clause in the siLozi language (K21) spoken in Zambia. The paper explores how the experience of the material and non-material world is construed through the grammar of the clause. The paper draws insights from Martin and Rose’s (2003) SFL to analyse the clause in siLozi in terms of what kind of clausal activities are undertaken in the siLozi clause’s PRTs, PRSes and CIRs; how the PRTs in these PRS-types are described; how they are classified and what they are composed of. The transitivity study of the clause in siLozi reveals that just like in English, the siLozi language expresses its clausal experience through the three major PRS-types namely MaPs, MePs and RePs. The minor PRS-types – VePs, BePs and ExPs – not only exist in siLozi but also construe experience both uniquely and also similar to English. Furthermore, the discourse structures in the process-types are deliberately selected and situated for various reasons. The findings have implications in using SFL transitivity in the teaching of some aspects of grammar such as comprehension in siLozi in schools in Zambia and in other countries like Namibia where siLozi is taught.