Let’s go back now to the EH vowel with two vertical dots. If you see two vertical dots underneath the first letter of the Hebrew word, then the vowel is EH. There’s nothing more to it.
However, if you find the two vertical dots under any other letter in the word, these two vertical dots act as a STOP SIGN. What do I mean by that? The two vertical dots underneath the letter stop the sound of the letter above. To proceed with reading the word, you then look to the next letter — to the left — to begin the next syllable and continue reading that word.
Here’s an example of when the two vertical dots make the EH sound. Notice that the dots are underneath the first letter of the word.
(GEHhAHsh) גְהָשׁ
Here’s an example of the two vertical dots in the middle of the word.
(ShEHnEHghAH) שֱׁנֶגְהֲ
or (GAHshnEHb) גַשְׁנֶבּ
What happens if there are two vertical dot vowels in a row in one word? The first two vertical dots are a STOP SIGN and the second two will make the EH sound. Because you stopped the sound of the word with a STOP SIGN, the next letter will need to have a vowel attached to that word. Therefore, the second set of two dots is treated like its the first letter of the word so we pronounce EH.
Here are a few examples:
(NEHbgAH) נֶבְּגְה
(TAHshnEHtAH) תֲשְׁנְתַּ
This pattern can continue on for as long as you want.
(HAHggEHbshEHt) הָגְגְבְּשֱׁת