The sentence opens with an adverb.
这个句子以一个副词开头。
Research and Implementation of Chinese Adverb Structure in Mechanical Product Design
机械产品设计领域汉语副词结构的`研究与实现
In modern Chinese, the adverb of time have the great development.
近代汉语时期，时间副词得到了长足发展，主要呈现出五个方面的特点：1、数量的增加；
Comparative Analyses of Summary Adverbs in Teaching Chinese as Foreign Language
面向对外汉语的都类总括范围副词对比分析
This paper discusses the levels of Chinese frequency adverb.
本文把频率副词从语义和形式上分为五级频率值。
A Summary Review of the Studies of Adverbs in Modern Chinese
现代汉语副词研究综述
A Study on the Acquisition of Chinese Modal Adverbs by Foreign Students
外国学生习得汉语语气副词调查研究