what is wrong with these two parts
1) his tone is triumphing
2) by telling his achievement(am i missing of between telling and his)
1) "triumphant", an adjective, would be a better word than "triumphing". Tones do not engage in battle.
2) "of" is optional at that location
this is cheating
To properly identify what is wrong with these two parts, let's break them down and examine the issues:
1) "His tone is triumphing."
The word "triumphing" is in the present continuous tense, indicating that it is an ongoing action. However, if we use "triumphing" in this context, it suggests that the person's tone is continuously achieving victory or success. It seems more fitting to use the adjective form "triumphant" to describe the tone, which means to express or indicate triumph or success. Therefore, the correct phrase would be "His tone is triumphant."
2) "By telling his achievement (am I missing 'of' between 'telling' and 'his')."
In this sentence, you are questioning whether the word "of" should be inserted between "telling" and "his." The correct use of "of" depends on the intended meaning. If the intention is to convey that he is telling the story or delivering information about his own achievement, then inserting "of" would be appropriate. For example: "By telling of his achievement."
However, if the intention is to indicate that he is directly sharing or announcing his achievement, then using "of" would be unnecessary. The sentence would be grammatically correct as it stands, without inserting the word "of": "By telling his achievement."