1. Run-- Running ( we doubbled the consonant "n" in the participle because there is vowel before it. But, "know" its participle is knowing. We dont double the consonent "W", even though there is a vowel before the letter "W". So can you explain this ? -- 'W' is not a consonant sound.
2. How we make simple present verb forms ? Here some times we are adding "s" some ti