1. Tom is one year older than John,

Question

2. Tom is twice older than John.
3. Tom is twice as old as John.
4. Tom is a little older than John.
5. Tom is two years older than John.
6. Tom is older than John by two years.
7. Tom is much older than John.
8. Tom is _________________.
....................................
Are they all grammatical? Do you have some more expressions suitable for the blank?

Answer 1

All except 2 look fine.

An alternate for 1 is this: Tom is a year older than John.

An alternate for 5 is this: Tom is a couple of years older than John.