The comma is still needed when if clause follows the main clause.
A、正确
B、错误
A、正确
B、错误
实用医学英语写作
章节列表
Chapter 1 Using proper words14Chapter 2 Writing effective sentences14Chapter 3 Composing coherent paragraphs14Chapter 4 Capitalization, word division, numbers and abbreviations14Chapter 5 Punctuation14Chapter 6 Email and notes15Chapter 7 Invitation and gratitude15Chapter 8 Recommendation letters15Final exam56Chapter 9 Apology and complaint letters14Chapter 10 Suggestion and refusal letters14Chapter 11 Resume14Chapter 12 Cover letter14Chapter 13 Personal statement14Chapter 14 Summary writing14