Chomsky (1957) proposes the do-support rule to rescue the stranded affix, which is not attached to its adjacent verb. Do-support takes place in different constructions, whenever the affix is stranded. However, there are some cases where do-support takes place even with the affix being adjacent to the verb. With an [+emphatic] feature, T does not behave like a normal T and affix hopping is blocked even though it is adjacent to the verb; instead, do-support takes place. On the other hand, auxiliary verbs are typically raised to T, but main verbs are not. However, there are also cases where verb movement does not take place. When auxiliary verbs are stressed for emphasis or at the end of a sentence, they are not raised. Instead of V-to-T movement, affix hopping also occurs with the case of auxiliary verbs, as in the case of main verbs. I suggest that the stress factor affects do-support, verb movement and affix hopping.
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