I had to separate what I wanted to say and speak in multiple sentences.
should have ~ は、〜すべきだった、という意味です。
say in multiple sentences, speak in multiple sentences, は、複数の文章で話す、という意味です。
「言いたいことを分けて言わなければならなかった」I had to separate what I wanted to say
I don't have to say it all in one sentence. You can break into several sentences.
この場合、次のような言い方ができますよ。
ーI don't have to say it all in one sentence. You can break into several sentences.
「全部を一文で言わなくても良いんだ。いくつかの文に分けていいんだね」
to break into several sentences で「いくつかの文に分ける」と言えます。
ご参考まで！
日本 
カナダ 
