Eng

Seriously...

認真

Attentive, Attentively, Earnest, Earnestly, Serious, Seriously

認真的

Attentively, Carefully, Seriously, Truly

(Attentive, Earnest, Earnestly, Serious, Actually, Really)

認真地

Attentively, Carefully, Earnestly, Seriously

(Attentive, Earnest, Serious)

一本正經地說

Said seriously, Seriously

(A, An, Proper, Respectable, Serious)