This study is an endeavor to find how English native and nonnative EFL/ESL (English as foreign language/English as second language) writers use adversative conjunctions to connect ideas together so that texts have both coherence and cohesion. Regarding the problems nonnative writers of EFL face when composing a piece of writing, we attempted a qualitative study through compiling a stack of 200 articles written by the two groups. The research design concerned the content analysis of research articles and descriptive statistics showing the frequency of occurrences of modals in the data. The findings indicated that the number of proper and correction adversatives exceeded those of contrastive and dismissal; the statistically significant difference between two groups lay in the use of proper and correction adversative conjunction, whereas the two groups showed little or no difference in the usage of contrastive or dismissal adversatives. These findings can help material writers, EFL/ESL teachers, and learners to appreciate the significant roles adversative conjunctions play in writing.