Plain form + ことだし

[Since; because (giving a reason)]

Connection: Verb/Adj (plain form) + ことだし / Noun + の/な + ことだし

Usage: Provides a reason or justification for a suggestion, decision, or action. Often used when giving one of several reasons, with a soft, conversational tone. Frequently leads to proposals or decisions.

Examples:

せっかく来たことだし、もう少しゆっくりしていきなさい。(Since you've come all this way, stay a while longer.)

天気もいいことだし、散歩にでも行こうか。(Since the weather is nice, shall we go for a walk?)

もう遅いことだし、そろそろ帰りましょう。(Since it's already late, let's head home soon.)