Connectives are words and phrases that link information. The aim of the current study was to investigate sentence-initial adverbial connective use in Swedish senior high-school students’ writing and explore a possible connection to time spent on Extramural English – abbreviated EE – a week. A qualitative analysis was carried out first, where a selection of course books for English 5 and English 6 were searched for instruction on adverbial connective use. Then, a quantitative corpus analysis was made of a sample from the Swedish Learner English Corpus, which had been divided into subcorpora based on total time spent on EE a week, using the software tool AntConc. Findings were inconclusive. The group that spent 15-30 hours a week on EE and the one that spent over 30 hours a week used a wider range of sentence-initial adverbial connectives than the group that spent less than 15 hours. However, the three groups were very similar in regard their most used sentence-initial adverbial connectives. A surprising finding was that the top group had the lowest frequency rate of sentence-initial adverbial connectives per 10 000 tokens, while the middle group had the highest. The rate of the bottom group was very close to the overall rate of the entire sample. The results of the present study highlight the need for more research on the area.