といえば/というと/といったら => N3
Considering, Concerning
ねばならない => Must A N2
Needs, Requirements
には[及「およ」]ばない => There is no need to A N1
Need/Requirements
てばかりはいられない => Cannot always A N2
Needs, Requirements
と([思「おも」]う、[言「い」]う、[考「かんが」]える) => That A N4
Particles
そういえば => Speaking of .., A by the way, A; N2
Considering, Concerning
[最中「さいちゅう」] => In the middle of A N3
Time, Situation
させて[頂「いただ」]きます/させてもらいます => Allow me to A N1
Miscellaneous
はさておき => A aside; putting A aside, B (new topic) N1
Miscellaneous
だろうと[思「おも」]う => I think probably A N4
Sentence Endings
ようと[思「おも」]う => I think I will A N4
Causative, Passive, Volitional
なければならない => Must do A; have to A N4
Can, Should, Must