Usually the letter I makes the vowel sounds in pin or pine. Only rarely does the letter I make another sound; the vowel sound in the words eat and feet; the name of the letter E. That is also an important sound, click here to read about it.
Your tongue should be low in your mouth when saying the vowel sounds in pin or pine. If your tongue is touching your upper teeth or the roof of your mouth, lower the back of your tongue, so that it’s not touching anything. Listen to how the sound changes when you move your tongue. Now you’ll be making a sound that is probably close to the vowel in the word pin. To make this vowel sound, your mouth should be almost closed, and relaxed. The tip of the tongue should be touching or almost touching the back of the lower front teeth.
Here are some more words with the same vowel sound:
Here are some words with the other vowel sound that the letter I makes:
Notice none of the words in the first list have a vowel, for example an E, at the end of the word. However, many in the second list do end in E. The ones that don’t end in E contain a silent GH. (There are exceptions to these patterns.)