JLPT N3 adverbs and connectives that link ideas and add nuance.

• 必ずかならずwithout fail; certainly; always
• きっとsurely; probably; most likely
• ぜひby all means; definitely (with a request/wish)
• 案外あんがいunexpectedly; contrary to expectation
• 実はじつはactually; to tell the truth; in fact
• 確かにたしかにcertainly; surely; indeed
• さすがas expected (of); just as one would expect
• わざわざgoing out of one’s way; taking the trouble to
• 偶然ぐうぜんby chance; coincidentally; accidentally
• 突然とつぜんsuddenly; all at once; abruptly
• 相変わらずあいかわらずas usual; as ever; same as always
• 主におもにmainly; mostly; primarily
• 別にべつに(with negative) not particularly; nothing special
• それでand so; for that reason; because of that
• そこでso; thereupon; that being the case
• したがってtherefore; consequently; accordingly
• ところがhowever; but (contrary to expectation)
• ただしhowever; provided that; with the proviso that
• たとえばfor example; for instance
• つまりin other words; that is to say; in short