Explanation
Expresses that something is natural or expected.
Formation
Verb-て form + 当然だ
Detailed explanation
The ～て当然だ grammar point is used to express that something is natural, obvious, or expected under the circumstances. It can be translated as 'it's natural that', 'as expected', or 'no wonder' in English.
Examples
Kare wa mainichi benkyō shite iru kara, shiken ni gōkaku shite tōzen da.
Since he studies every day, it's only natural that he passes the exam.
Sono resutoran wa ryōri ga oishii node, yoyaku ga ippai ni natte tōzen da.
Because that restaurant’s food is delicious, no wonder its reservations are always full.
Kanojo wa maiban renshū shite iru node, jōzu ni natte tōzen da.
She practices every night, so it's natural that she becomes skilled.
Kare wa shigoto de seikō shite ite, okanemochi ni natte tōzen da.
He has succeeded at his job, so it's only natural that he's become wealthy.
Practice
Grammar content sourced from hanabira.org.