True: we don't need to invert the subject and the verb when the question word is not introducing a question, You need to invert the subject and the verb after a question word introducing a question., The question words work as connectors, most of the time a prepositional phrase modifies the noun or the verb, An expression of place can only be a word and not an entire prepositional phrase, Seldom is an almost negative expression, we can invert the conditionals or just keep the complete form, You can only invert the conditionals if you have were, had, should, A conditional sentence can be correct in the complete form, False: we always need to invert a subject and a verb after a question word, A question word is Did or do at the beginning of a question, In the mountains I walked for many hours needs to be inverted, we always need to invert the subject and the verb after a prepositional phrase, If the clause doesn't make sense without the expression of place you don't need to invert the subject and the verb, we can't invert the subject and the verb if we have an almost negative expression, you can invert every conditional, You need to always eliminate if in the conditionals,

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