2015年考研英语写作必知13种逻辑关系时空关系

　　【时空关系】

　　afterwards; as soon as; at least; before; eventually; every; first; first of all; first and foremost; for a start; meanwhile; in the meantime; while; now; next; not until; later; formerly; previously; prior to; since then; since; subsequently; till; to begin with; to start with; when; then