This is probably drifting far away from anywhere, but I chased down the
Anglo Saxon Chronicle entry (Parker MS) for 1070.

Here follows (for anyone interested) the original (with thorns replaced by
'th'), and a contemporary translation. (Both taken from the Web, I hasten
to add!)

My sense is that, syntactically, they're relatively similar, and that many
of the apparent sematic variations are due to sound-changes.

Not all, in either case, but I think this does suggest (for what it's worth)
that the shift from English as a predoninantly synthetic to a predominantly
analytic language was +well+ underway by 1070, before the impact of Norman
French.

But here is the text -- judge whoso list.

Robin

Her Landfranc se the wæs abbod an Kadum com to ængla lande, se efter feawum
dagum wearth arcebiscop on Kantwareberig.
He wæs gehaded .iiii. kalendæ Septembris, on his agenum biscopsetle fram
eahte biscopum his underthioddum; tha othre the thær næron thurh ærendrakan
and thurh gewrite atiwdon hwi hi thær beon ne mihton. On tham geare THOMAS
se wæs gecoran biscop to Eferwic com to Cantwareberig thæt man hine thær
gehadede efter than ealdan gewunan. THa tha Landfranc crafede fæstnunge his
gehersumnesse mid athswerunge. tha forsoc he. and sæde thæt he hit nahte to
donne. THa gewrathede hine se arcebiscop Landfranc. and bebead tham biscopan
the thar cumene wæran be thas arcebiscop Landfrances hæse tha serfise to
donde. and eallan than munecan, thæt hi scoldan hi unscrydan. and hi be his
hæse swa didan. Swa Thomas to tham timan agean ferde buton bletsunga.

This year Landfranc, who was Abbot of Caen, came to England; who after a few
days became Archbishop of Canterbury. He was invested on the fourth before
the calends of September in his own see by eight bishops, his suffragans.
The others, who were not there, by messengers and by letter declared why
they could not be there. The same year Thomas, who was chosen Bishop of
York, came to Canterbury, to be invested there after the ancient custom. But
when Landfranc craved confirmation of his obedience with an oath, he
refused; and said, that he ought not to do it. Whereupon Archbishop
Landfranc was wroth, and bade the bishops, who were come thither by
Archbishop Landfranc's command to do the service, and all the monks to
unrobe themselves. And they by his order so did. Thomas, therefore, for the
time, departed without consecration.