In all four sentences, the result is grammatical (and coherent) whether you put the noun (or pronoun) in front o the verb or after. To a native ... ... <看更多>

What's the difference between a common noun and a proper noun ?Practice this yourself on Khan Academy right now: ... ... <看更多>

know about parts of speech, noun, pronoun, verb, adverb but how to put these parts of speech in particular structures. In English there are ... ... <看更多>