每一個公司的年度報告都包括了三個財務報表，它們是資產負債表、損益表及財務狀況變動表，三表任缺其一，審計師就不可能簽發無保留審計意見書。在無保留審計意見書里，審計師確證公司的財務報表系依據一般公認會計原則編制，可以公正表達公司在該財務年年底的財務狀況、該財務年度的經營成果及財務狀況的變動情形。無保留審計意見書也稱“潔凈意見書”。表達公司財務年年底財務狀況的報表就是資產負債表。公司在財務年度里的經營成果和財務狀況變動的情況則分別由損益表及財務狀況變動表來表達。必須特別強調的是，所謂的報表除了表內的數字外，也包括表后的附注說明。我們將在接連下來的幾期分別介紹這三個報表。　　公司在財務年度之初有個資產負債表，在財務年度之末有另一個資產負債表，就好像在年初及年尾各拍了一張照片。至于公司究竟如何從年初的樣子變成年末的樣子，就概括在該年度的損益表及財務狀況變動表里了。　　審計意見的種類除了前述的“無保留意見”外，還有“保留意見”及“反面意見”。當審計師無法確證公司的財務報表具有公正表達性時，他將視其嚴重程度，簽發保留意見或反面意見。如果他認為受審的財務報表具有重大的誤導性，根本無法公正表達公司的財務狀況、經營成果及財務狀況變動，他應該簽發反面意見書。　

保留意見適用于審計師無法確證報表中少數，但重要項目的公正表達性。保留意見并不一定意味著公司的這些會計數字有假，只要審計師無法滿意這些數字的公正表達，他就應該對這些項目保留意見。例如，公司在某國之子公司，由于戰爭或天災，查帳工作無法正常進行，以致于審計師無從判斷該子公司報表的可信度。包括了此子公司報表的合并報表的公正表達性自然也受到影響，審計師會就此困難，對此部分的財務數字保留其意見。

A company's annual report must contain three key financial statements -- the Balance Sheet (BS), the Income Statement (IS), and the Statement of Changes in Financial Positions (SCFP). An unqualified audit opinion from the auditor will not be possible if any of the three statements is absent. In an unqualified audit report, the auditor certifies that the audited financial statements are prepared in accordance with of the Generally Accepted Accounting Principles (GAAP) and are able to fairly present the company's financial position at the end of the financial year and its performance as well as the changes in financial positions for the financial year. An unqualified audit report is also known as a "clean" report.　The BS is the statement that presents the company's financial position at the year-end. The company's performance and changes in financial positions for the year are respectively presented by the IS and the SCFP.　For a financial year, the company has a BS at the start, another at the end. They are like two pictures of the company, one taken at the start of the year, the other at the end of the year. How the company changed from the first picture to the second picture is captured by the IS and SCFP of the year.　According to the opinion expressed by the auditor, there are essentially three types of audit reports, the unqualified or clean report mentioned above, the qualified report, and the disclaimer. When an auditor cannot certify the fair-presentation quality of the financial statements, he will issue a qualified opinion or a disclaimer depending on the seriousness of the matter. If in his opinion the financial statements are so misleading that they are not able to fairly present the company's year-end financial position, the performance and financial position changes for the year, he should issue a disclaimer.　If he has problem with some (but material) part(s) of the financial statements, a qualified opinion is in order. A qualified opinion does not necessarily imply that the accounting figure in question is false. As long as the auditor is not satisfied with the fair-presentation quality of any material financial, he should qualify his audit opinion with respect to that financial. For example, if the audit work on a subsidiary of the company, due to war, natural disaster, or some other reasons, cannot be carried out to the satisfaction of the auditor, the auditor may have to qualify his opinion on the consolidated financial statements.