Shapeless wrote:In this case, you wouldn't conjugate to come in accordance with dream because dream is not the subject of the sentence. The subject of the sentence is This; come true is an adjectival clause that modifies the noun dream. Furthermore, dream come true is one of those common idioms in English in which the verb takes the subjunctive form.
Well said. This is quite a difficult concept, probably best understood by a foreign learner as a complete phrase "a dream come true".
Yes, subjunctive. Look it up in your book, Yoong liat