But you do have to be aware of it, and there are certain conventions.

A rather more realistic approach would be to point out that there are certain conventions which have been imposed by traditional working methods.

There are certain conventions of grammar that we seem to forget and about which it may be best if I were to remind you.

That sometimes made it hard for me to understand the importance of certain conventions to others.

It changed owners every few years, but was still quite popular with certain conventions.

There seems to be a certain convention that governs what goes on.

Nevertheless, certain conventions stand among the many editions of the text.

By convention certain well known ports are associated with specific applications.

However, once one appreciates certain conventions, the forms of the names fall into shape.

Movies have reached the point where you need to destroy certain conventions.