1. Explain it simply
Use the pattern 不 A 也不 B to mean 'neither A nor B'.
Repeat 不 in front of each word, and put 也 right before the second 不.
A and B are usually the same type - two adjectives or two verbs.
2. Show examples
天气不冷也不热。
Tiānqì bù lěng yě bù rè.
Sandhi:Tiānqì bù lěng yě bú rè.
The weather is neither cold nor hot.
two adjectives
我不吃也不喝。
Wǒ bù chī yě bù hē.
I neither eat nor drink.
two verbs
这本书不新也不旧。
Zhè běn shū bù xīn yě bù jiù.
Sandhi:Zhè běn shū bù xīn yě bú jiù.
This book is neither new nor old.
也 sits before the second 不
3. Share a tip
Keep 也 directly before the second 不. Don't move it to the front or the end of the sentence.