Difference Between It and is
It and is – are two grammatical words which have their own set of differences.
‘It’ is a demonstrative pronoun. It is used to describe something about which you talk. Let us consider a sentence ‘I love the Pizza, it is so tasty’, we have already had a talk about the pizza and when we are saying ‘it’ we mean the same pizza. The word ‘it’ is used to convey a general sense. As for example, ‘it is a good to look sideways before crossing the road. In this sentence the word ‘it’ is used to convey the general idea of looking sideways before crossing the road at all times.
The word ‘is’ is not a direct verb but an indirect verb- auxiliary verb that implies the meaning of ‘to be present’. As for example ‘I am in India’ and ‘the fish is in the aquarium’. In the first sentence the verb ‘is’ gives us the idea that I am present in Australia. In the second sentence the verb ‘is’ implies that the fish is present in the aquarium.
The word ‘is’ is used in present continuous tense. As for example, ‘the boy is looking at the tree. In this sentence the word ‘is’ conveys the idea of ‘presently the boy is looking at the tree. The action of ‘looking’ was going on when the speaker spoke the sentence.