Table:
text: Middle English phonology
Diphthongs
Diphthongs
Late_Old_English_Anglian Early_Middle_English Late_Middle_English Early_Modern_English Modern_English Example
æh, ah, ag# /auh/ /auh/ ( [x] → nil) /ɔː/ /ɔː/ slæht (WS sleaht) + -or > slaughter
æh, ah, ag# /auh/ /auh/ ( [x] → /f/) /af/ /æf/ hlæhtor > laughter
eh /ɛih/ /ɛih/ /ei/ > /eː/ /ei/ streht > straight
āh, āg#, oh, og# /ɔuh/ /ɔuh/ ( [x] → nil) /ou/ > /oː/ /ɒf/ (British), /ɔːf/ (American) dāg > dāh > dough
āh, āg#, oh, og# /ɔuh/ /ɔuh/ ( [x] → /f/) /ɔf/ /ɒf/ (British), /ɔːf/ (American) trog > trough
āhC, ohC, ōhC /ɔuh/ /ɔuh/ /ɔː/ /ɔː/ dohtor > daughter; sōhte > sought
ōh#, ōg# /ouh/ > /uːh/ /uːh/ ( [x] → nil) /əu/ /au/ bōg > bough; plōg > plōh > plough
ōh#, ōg# /ouh/ > /uːh/ /uːh/ ( [x] → /f/) /ʊf/ (centralized) /ʌf/ tōh > tough; ruh > rough

Question: What is the phonology used in the example streht > "straight" in Middle English phonology?

Question: What is the example of Early Modern English ( [x] → /f/) /ɔf/ in Middle English phonology?