Answer:
1: alterING
2: confusING
3: exclaimING
4: intendING
5: persistING
6: migratING
7: preparING
8: locatING
Step-by-step explanation:
You would add "ing" to the end of each of these words to turn them into nouns. Pay attention to the spelling when you add "ing" because for some words, you need to change them.