When using if and can't they both have the similar "self doubt" aspect in them. Like "If I can do it..." and "I can"t do it." Both of these statements are basically questioning their self worth.
There are a few that aren't really supposed to be used in formal writing. contractions, for example, are supposed to be written out--"don't" becomes "do not"--because contractions are something we vocally combined to make our speech a little lazier and flowy. this makes contractions a more "casual" part of speech. interjections aren't encouraged either, because we typically make interjections in casual speech; these don't go hand in hand with formality.
Hybrid electric vehicles are powered by an internal combustion engine and an electric motor, which uses energy stored in batteries. A hybrid electric vehicle cannot be plugged in to charge the battery. Instead, the battery is charged through regenaritive braking and by the internal combustion engine. The extra power provided by the electric motor can potentially allow for a smaller engine. The battery can also power auxiliary loads like sound systems and headlights, and reduce engine idling when stopped.
