Here are the correct forms and tenses for the verbs and words in brackets based on the text you provided:

1. **ability** → "able"
*Although the Anglo-Saxons would be (1) able to recognize many individual words...*

2. **recognize** → "recognizable"
*...that would be hardly (2) recognizable to them.*

Here is how the full sentences would look:

- Although the Anglo-Saxons would be **able** to recognize many individual words, it's the way in which those words are put together to make sentences that would be hardly **recognizable** to them.