In a tone language, tonal distinctions between words in sequence can often be analyzed using the same devices that are applied within the word (e.g., downdrift or downstep). However, it is proposed here that Sandawe is a tone language in which the tonal relationships between constituents in clause structure, and between constituents in phrase structure, have a particular function and, sometimes, a form that differs from that seen within a word. Both constructed clauses and clauses from recorded oral texts are used first to explain and illustrate patterns of tone within words and in the noun phrase, associative constructions, the basic clause, marked constituents, the narrative clause, the copular clause, the irrealis clause, and a class of clauses with one particular suffix. A study of similar phenomena in Nama is also used for comparison. A brief bibliography is included. (MSE)