a long vowel: "match", "fault", "brick" (Spanish , ; Russian "oven"). An exceptional word with CVCC is "gnat". Superheavy CV꞉C and CVCC syllables are well attested word-finally in specific verb forms. For example, the Suppositional suffix can be final as in yielding "he must have run down". More typically a superheavy syllable occurs when the rightmost suffix is one of several evidential suffixes containing an vowel that deletes when no other suffix follows, such as the Circumstantial in "he must have drowned" and the Visual in "I saw it run in". Stress The determination of stress is quite complex and the main stress can fall on any of the first five syllables in a phrase, depending on various factors. According to the analysis in Buckley (1994), iambs are constructed from left to right and the leftmost foot generally receives the main stress: "I ran in", "he is peeking in there". Non-initial feet do not receive secondary stress but lead to lengthening of vowels in open syllables (which however does not apply to word-final vowels nor to a large set of suffixes occurring toward the end of the word). The initial syllable is extrametrical unless the word begins with a monosyllabic root, as in the case of "run". For example, the footing in "start to cut downward" with the root "cut" skips the first syllable, while in "keep running all the way around" this is blocked by the short root "run". The pattern is further complicated when the first foot begins on a syllable that has a long vowel, as in "tell". If the following syllable is closed, the stress shifts to the foot that contains that syllable: "cause to bring a message out here". If the long vowel is followed by a CV syllable, i.e. if the initial sequence to be footed is CV꞉CV, the length moves rightward to create CVCV꞉ and the stress similarly shifts to the next foot: "bring a message out!". Combined with extrametricality, this can lead to stress as far in as the fifth syllable: "always be too shy" from the root "be shy"; this verb forms a minimal pair with "gather", which lacks stress shift in "always gather". While iambic lengthening is determined by footing within a word, stress can be reassigned at the phrasal level across word boundaries: "be good!" where is the adjective "good" and the remainder is the imperative verb. Phonological processes