✔ 最佳答案
1. Both Mary and Daisy speak Italian.
- The verb following "both ... and ..." should be in plural.
2. Either John or Paul gets the highest score.
- The verb following "either ... or...." should be in singular.
3. Neither Sally nor I knows what the teacher said.
- Also singular.
4. Not only should we give our thanks to our class teacher, but also to our school principal.
OR
We should not only express our gratitude to our class teacher, but also to our school principal.
- Usually when we use "not only... but also", we tend to use "inversion" as well, i.e. placing the verb before subject, as in the first sentence. Inversion is used to give emphasis.