She has a ________ command of the French language.

Understand the Problem

The question is asking for a word that best completes the sentence about a person's level of proficiency in the French language. The focus is on the appropriate adjective to describe the command or control they have over the language.

More Information

In English, the phrase 'a good command of' is commonly used to describe someone's proficiency in a language. It indicates that the person is highly skilled and fluent in that language.

Tips

A common mistake is using 'command in' or 'command over' instead of 'command of'. Ensure the correct preposition 'of' is used.

Sources

• Which one is correct; I have a good command of the English ... - Quora - quora.com
• He has very good command in/over/of English - ell.stackexchange.com