大學英語四級考試涉及的語法知識點多、涉及麵寬，對不少考生來說都是一個難題。希望通過本文的學習，考生能對四級語法有更全麵的掌握!

　　方式狀語從句：

　　方式狀語從句通常由as，as if，as though，the way，what引導;

　　eg：Always do to the others as you would be done by.

　　When enter rome do as the romans do.

　　(1)as從句帶有比喻的含義，意思是"正如…"，"就像";

　　(2)as if/though："仿佛……似的"，"好像……似的";

　　有時用虛擬語氣，有時不用;

　　eg：They completely ignore these facts as if (as though) they never existed. (與事實相反，謂語用虛擬語氣。)

　　He looks as if (as though) he had been hit by lighting.

　　(與事實相反，謂語用虛擬語氣。)

　　It looks as if the weather may pick up very soon.

　　(實現的可能性較大，謂語用陳述語氣。)

　　(3)the way：可以連接兩個句子，表達就像……一樣;

　　eg：I should do the job the way my father did.

　　Many Europeans now apparently view the US. the way many Americans view Mexican as a cheap place to vacation, shop and party.

　　(4)what：就像，猶如;

　　eg：Air is to man what/as water is to fish.

　　句型：A is to B what C is to D.

　　eg：A1 Gore calls global warming an "inconvenient truth," as if merely recognizing it could put us on a path to a solution.

　　put sb. on a path to a solution：找到解決的辦法;