The American R is like a vowel because it does not touch anywhere in the mouth. If these and those are pronounced with a D instead of a TH, it sounds like dese and dose, which is considered lower class in America. Here are some very high-frequency TH words: the, these, those, they, them, there, they're, their, this, that and then. As the most commonly used word in English is the word the, the Th is very important. The middle T is what makes a word like meeting sound like meeding. S a consonant, but it acts more like a vowel, because the tip of the tongue doesn't touch anywhere in the mouth.
The three most distinctive consonants are R, the American middle T, and the Th sound. These are the vowels found in cat, caught and cut. This last symbol, called the schwa, is represented with an upside down e, and is the most common sound in the English language. The three most important vowels are æ, ä, and.
Once you have thoroughly studied intonation and word connections, you can begin to address the sounds of English.
