I know that the words are "Judge/judged" and Hashem's name. However, which one of these is the meaning of the name: HaShem is my judge HaShem judged me

I'm trying to understand the underlying grammar of the Shema. I am told that a בגדכפת letter takes a דגש following a closed syllable (examples of this: נִשְׁבַּ֧ע and בְּקִרְבֶּ֑ךָ) (i.e. ends with the letter and not the vowel), so why do words like: וּכְתַבְתָּ֛ם not take a דגש in the first ת?