[事「こと」]だ => A is necessary/good (offering advice/suggestion) N3
Needs, Requirement
に[限「かぎ」]った[事「こと」]ではない => It's not limited to A, it's not only A N1
Degree/ Level/Amount
[事「こと」]ができる => Be able to A; can do A, Can A; be possible to A; N4
Causative, Passive, Volitional
といい~といい => Based on A and B, considering A and B N1
Reason, Result, Response
ずにはいられない/ないではいられない => Can't help but A; A is unavoidable N2
Will, Decision, “Doing”
といえば/というと/といったら => N3
Considering, Concerning
ないものでもない/ないでもない => A is not completely impossible N1
Need/Requirements
[命令「めいれい」] => Do A (command) N4
Can, Should, Must
かい => Really? N4
Sentence Endings
~ないでください => Please don't do~ N5
Asking and Telling
くらいだ/ぐらいだ => Around/about N5
Amount
せいで/せいか => Because of A, B N3
Reason, Result, Response