that being the case, because of ..., the reason is ..., given that ...
Informal Verb / い-Adjective +
Verb
Verbs in their dictionary form or past tense form can be followed directly by
図書館へ行く
Since I will go to the library, I will borrow a book.
たくさん食べた
Because I ate too much, my stomach hurts.
い-Adjective
い-Adjectives in their present or past informal forms can be followed directly by
寒い
Since it is cold, I will wear a coat.
映画が面白かった
Because the movie was interesting, I watched it again.
な-Adjective / Noun + な / だった +
When using な-Adjectives or Nouns in the present tense, な must be added before
な-Adjective
For な-Adjectives, use な in the present tense and だった in the past tense before
静かな
Since it is quiet, I can study.
昨日は暇だった
Because I was free yesterday, I went shopping.
Noun
For Nouns, use な in the present tense and だった in the past tense before
今日は日曜日な
Since today is Sunday, the shop is closed.
雨だった
Because it was rain, I stayed at home.
In the present tense, you must use な instead of だ. In the past tense, you use だった.