Cheap - expensive
Clean - dirty
Comfortable - uncomfortable
Convenient - inconvenient
Fast - slow
Modern - old-fashioned
Reliable - unreliable
Safe - dangerous
inconvenient-convenient
dangerous-safe
uncomfortable-comfortable
expensive-cheap
slow-fast
unreliable-relaible
dirty-clean
old-fashioned-modern
there are very comfortable bus seats in my city
there are very clean streets in my city
but very expensive products
cars relaible but always drive fast
