Question

sanjay is too small to learn writing.(use so)

Answer 1

Sanjay is so small to learn writing

Answer 2

Hey there!

In these types of sentences we change 'too' into 'so' and 'to' into that and we add 'not' if it isn't given in the sentence.

So, the answer will be:

Sanjay is so small that he cannot learn writing.

Hope It helps You!