Each apartment has at least one native speaker to ensure correct language usage.

At this point grandparents take the role of educating the children to correct language usage.

English language usage varies between countries, and is now largely historical.

Therefore, guidance on English language usage can come from many sources.

Because such items reflect current culture and actual language usage, they are much valued as teaching tools.

Does not allow researchers to make claims about language usage.

From language usage to prayer and magic, the religious aspects slide their way into every book.

These are well established in technical language usage but they have their shortcomings.

The equivalent changes in language usage have not kept pace with contemporary demand.

Such language usage is, however, clearly described only from animals especially taught in laboratories.