Hello Dcomest I'll do a couple, and maybe someone else will do the rest: 1. (a) Until what time are you staying? (grammatical)/(b) What time are you staying until?
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Why are (b) and (c) ungrammatical while (a) is grammatical?
(a) What John preferred was for Mary to leave early.
(b) *What John believed was for Mary to leave early.
(c) *What John persuaded was for Mary to leave early.
but (e) and (f) is grammatically correct.
(e) What the colonists wanted was to be free from external taxation.