Grammar Point
so, therefore, and, (and) then
Sentence 1.
Used as a conjunction at the beginning of a sentence to show that the previous statement is the direct cause or reason for the current statement.
Connecting Sentences
Connects two independent sentences where the first sentence provides the reason for the second.
財布を忘れました。
I forgot my wallet. Therefore, I couldn't buy the book.
雨が降りました。
It rained. So, the game was canceled.
Note