This video presents the 4 most common tenses in academic writing : According to corpus research, in academic writing, the four tenses used ... ... <看更多>

Using Perfect Infinitives with Modal Verbs | English Grammar. The structure “have + past participle” is called a perfect infinitive. ... <看更多>

Definition, Grammar, Problems. Transition signals are an essential part of good academic writing. This video gives a definition of transition ... ... <看更多>