と[思「おも」]いきや => Even though A (was thought/expected), different result B N1
Contrast/Surprise
ないと,なくちゃ => Must do A N3
Needs, Requirement
や、やいなや => As soon as A, B N1
Time, Situation
に[基「もと」]づいて/に[基「もと」]づき/に[基「もと」]づく => Based on A N2
Based, Focused, Depending on
を[機「き」]に => Use A as an opportunity N1
Time, Situation
をかわきりに => Starting with A N1
Miscellaneous
をもとに/をもとにして => A as a basis for B N2
Based, Focused, Depending on
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
をください => Please give me N N5
Asking and Telling
のもと/をもと => Based in/on A N2
Based, Focused, Depending on
はもちろん/はもとより => Although A is given/obvious; B N3
List, Examples
やら~やら => A, B, ... (examples from a list) N2
Lists, Examples