Put your hand in front of your mouth to feel the "t" sound burst of air. Touch your throat to feel the difference in vibration for these two sounds (voiced and unvoiced).
Touch the tip of your tongue to the back of your upper teeth then drop your tongue and blow out air.
Touch the tip of your tongue to the back of your upper teeth then release your tongue and use your voice.
The "t" sound
The "t" sound
The "d" sound
The "d" sound
NOTE: "tr" and "dr" sounds are consonant blends. In blended sounds, you pronounce both letters quickly together in one syllable.