Para.17 Thus,not only is more carbon dioxide being added to the atmosphere through burning of fuel but as the forests disappear,less carbon dioxide is being removed from the atmosphere by plants. (1)Q:What's the grammatical function of "not only"at the beginning of the sentence? A:Inversion.Inversion must be used when a negative word is put at the beginning of a sentence. Para.17 ❖ Thus, not only is more carbon dioxide being added to the atmosphere through burning of fuel, but as the forests disappear, less carbon dioxide is being removed from the atmosphere by plants. ❖ (1) Q: What’s the grammatical function of “not only” at the beginning of the sentence? ❖ A: Inversion. Inversion must be used when a negative word is put at the beginning of a sentence