I have seen a few restrictive and non-restrictive clauses with no ‘that’ and ‘which’ respectively. For example:
- It’s a car I bought last year.
- The pen I bought today.
To me, the sentences should be structured as follows:
- It’s a car that I bought last year.
- The pen, which I bought today.
Kindly let me know which amongst the above sentences are acceptable, grammatically.