This study focuses on verbal errors in the written production of Chinese learners. Verbal errors refer to a use of the verbal unit that does not conform to those of the norm, such as those observed in reference dictionaries and grammars. Verbal errors concern several dimensions: at the morphological level, at the semantic level and lexical co-occurrences, at the level of grammar and syntax and at the level of context and gender. On the basis of error analysis research and learner’s corpus research, we have developed a grid of errors based on the errors identified in the corpus. This grid of errors helped us to semi-automatically build a corpus of Chinese learners indicating verbs and verbal errors. Our objective was to reveal the main difficulties of Chinese learners with regard to the verbal units, to highlight the circumstances where errors appear frequently, and to identify possible sources of the difficulties. The results showed that verbal errors made by Chinese learners focus on the conjugation and the agreement of the verb, the time, the aspect and the mode of the verb, the lexical meaning of the verb, the prepositions governed by verbs, and the wrong syntactic structures related to the verb. Inattention aside, we have identified others possible sources of errors: the negative transference of Chinese and English, the deficiency in language knowledge of French and the morphological proximity between the target verb and the verb used.