Fun with English.

-ee	eak/each	ight	ought/aught…	Notes
	wreak		wrought	Thinking about this is what started this whole table.
see	seek	sight	sought	Here’s a nice complete version.
	teach	[tight???]	taught	Variation of -ch and -k. All would have been like a Scottish or German ch back in the day (where BITD means late medieval period mas o menos).
may	[meek???]	might		(I’ll note here that “ought” seems like avoir in the French to have become merely an “ending” as a modal verb.)
buy		bight	bought	(Is this why Microsoft picked “Bing™” as their search engine name? Get that subliminal “Buy! buy! buy!” message in there.) I’m having trouble envisioning a semantic connection between “bight” and buying. Anyone?
vie (fie?)		fight	fought
	catch		caught
	think		thought	I suspect that an original -in- shifted to an -ee- , lengthening in compensation for dropping the n, but I may have it backwards.
	drink		draught	Aha! Why draught is spelt as it is!
	sink		shaft	Mining on the brain?
	bring	[bright???]	brought	Here, the -ink has softened into an -ing.
		light	laughter	I would love for these to be connected. Too good to be true?
plea		plight
flee		flight
knee		knight		Knights kneel to be knighted. “Kinn-nigget” isn’t a bad approximation of the BITD pronunciation.
[free???] fray	freak	fright	fraught	“Freak” is speculative because it’s awfully nouny, and everything in its column so far is solidly in the verb camp.

Blue indicates speculations. Red things that on semantic grounds don't seem to belong. I came up with this before (while?) falling asleep the other night. Its sense may be naught.