Another thing you can do withbuy pandora jewellery unvoiced and voiced sounds like t and d is look in a mirror and make sure that your mouth doesn't change shape. If the two consonant sounds you are practising are not a voiced/ unvoiced pair, however, you should check at least that your mouth changes shape when you pronounce them. For example, the sh from sheep shouldsilver pandora beads have a much more rounded mouth than the s from sleep. The same thing is true for vowel sounds, as no two vowel sounds are said with the same mouth positions. This is true even with vowel sounds which are sometimes paired up. For example, the ee from sheep is not just a long version of the i from ship, as the mouth needs to be pulled much wider in the former - that is Cheap Pandora charmswhy we say "cheese" and not "chips" when we take a photo!
With diphthongs like /ai/ and /ei/, you should make sure that your mouth is moving while you are pronouncing the sound. This is because diphthongs are basically a combination of two short vowel sounds. This is also the best way of distinguishing diphthongs from similar long vowel sounds. For example, your mouth should move while you say the O in hope but stay still while you say the long "or" sound in more.
You can practise mouth shape in more detail Pandora beads on salewith a book or website that shows mouth shapes for each sound, or you could watch a video very closely and try to copy the actor.
If you have problems pronouncing h in English (common for French and Spanish speakers, for example), you can practise this with a mirror in another pandora necklaceway. Put the mirror very close to your mouth. After a word with h, the mirror should be steamed up as if you were going to polish it - but not covered in spit!