a step. For example, in That can be frustrating, That can be has pitch 2, frus- has level 3, and both syllables of -trating have pitch 1. Wh-questions work the same way, as in Who (2) will (2) help (3↘1)? and Who (2) did (3) it (1)?. But if something is left unsaid, the final pitch level 1 is replaced by pitch 2. Thus in John's (2) sick (3↘2) ..., with the speaker indicating more to come, John's has pitch 2 while sick starts at pitch 3 and drops only to pitch 2. Yes–no questions with a 2↗3 intonation pattern usually have subject-verb inversion, as in Have (2) you (2) got (2) a (2) minute (3, 3)? (Here a 2↗4 contour would show more emotion, while a 1↗2 contour would show uncertainty.) Another example is Has (2) the (2) plane (3) left (3) already (3, 3, 3)?, which, depending on the word to be emphasized, could move the location of the rise, as in Has (2) the (2) plane (2) left (3) already (3, 3, 3)? or Has (2) the (2) plane (2) left (2) already (2, 3, 3)? And for example the latter question could also be framed without subject-verb inversion but with the same pitch contour: The (2) plane (2) has (2) left (2) already (2, 3, 3)? Tag questions with declarative intent at the end of a declarative statement follow a 3↘1 contour rather than a rising contour, since they are not actually intended as yes–no questions, as in We (2) should (2) visit (3, 1) him (1), shouldn't (3, 1) we (1)? But tag questions exhibiting uncertainty, which are interrogatory in nature, have the usual 2↗3 contour, as in We (2) should (2) visit (3, 1) him (1), shouldn't (3, 3) we (3)? Questions with or can be ambiguous in English writing with regard to whether they are either-or questions or yes–no questions. But intonation in speech eliminates the ambiguity. For example, Would (2) you (2) like (2) juice (3) or (2) soda (3, 1)? emphasizes juice and soda separately and equally, and ends with a decline in pitch, thus indicating that this is not a yes–no question but rather a choice question equivalent to Which would you like: juice or soda? In contrast, Would (2) you (2) like (2) juice (3) or (3) soda (3, 3)? has yes–no intonation and thus is equivalent to Would