Most people use the rising and falling inflections fairly well; they simply don't make them broad enough. Exaggerate the pitch change on the following to find a new way. In performance strive for a balance between the old and new.
Inflections.
yes
Grammar is the set of rules that defines word formation, syntax, inflections and proper usage of a language.
In some languages, yes. But not in English. All English grammatical inflections (not that there are very many of them and most of them are -s) are suffixes. Prefixes are used to change the meaning of the word not as grammatical indicators. In Swahili, on the other hand, all grammatical inflections are prefixes. Swahili does not use suffixes.
No, but they can help when the grammar is incomplete or not strictly correct. For example, the correct grammatical interrogative form is "Are you going out?" But you can convey the same meaning if you say "You are going out" with your tone rising at the end of the sentence.
Inflections.
Latin is a language that relies primarily on inflections to convey grammatical meaning through changes in word endings. These inflections indicate the role of a word in a sentence, such as subject or object, rather than relying on word order like English.
Synthetic language depends primarily inflections to communicate grammatical meaning. Examples of synthetic languages are most Indo-European languages, all Kartvelian languages such as Georgian, some Semitic languages such as Arabic, and many languages of the Americas, including Navajo, Nahuatl, Mohawk and Quechua.
Certain words you emphasize
No, modern English is not a language with leveled inflections. It has lost many inflections found in older forms of English, such as Old English. Instead, English relies more on word order and auxiliary verbs to convey meaning.
three
yes
it is a change in pitch or tone
yes
Recitative
Yes, using voice inflections can make a message more meaningful by adding emotion and emphasis to your words. It can help convey nuances, intentions, and emphasis that a monotone delivery may not capture. Voice inflections can also engage the listener more effectively and make your communication more engaging and memorable.
The case inflections would be; wicca, wiccae, wiccam, wiccarum, wiccis.