using "that is" in a sentence
Solution 1:
'that is' means 'in other words'. If you put a comma after 'that is', it becomes like an extra phrase in the sentence, so it doesn't matter whether the noun following is singular or plural.
using "that is" in a sentence
Solution 1:
'that is' means 'in other words'. If you put a comma after 'that is', it becomes like an extra phrase in the sentence, so it doesn't matter whether the noun following is singular or plural.