221 representing projection levels which posits that (first-) merge of a head H with its complement forms an H-bar constituent, (second-) merge of a head with a specifier forms an H-double-bar constituent, (third-) merge of a head with a further specifier forms an H-treble-bar constituent, and so on (with the maximal projection of H being labelled HP). On A-bar position, see A-position. Bare: A bare infinitive structure is one which contains a verb in the infinitive form, but does not contain the infinitive particle to (. the italicised clause in ‘He won’t let you help him’). A bare noun is.
