英文從句主要有以下幾種：
1.名詞從句這些從句在句子中充當名詞，可以用作主語、賓語、謂語或同位詞。
主語子句：例如"that he will come is certain."
賓語子句：例如"i believe that he is honest."
謂語從句：例如"the problem is that we don't h**e enough time."
從句：例如"the fact that he won the competition surprised everyone."
2.形容詞從句 關係從句這些從句在句子中充當形容詞來修飾名詞或代詞。
限制性形容詞從句：例如"this is the book that you are looking for."
非限制性形容詞從句：例如"my brother, who lives in new york, is a doctor."
3.狀語從句這些從句在句子中充當副詞，以說明時間、地點、原因、效果、目的、條件、讓步、比較等。
時間狀語從句：例如"i'll call you when i arrive."
地狀語從句：例如"sit where you can see me."
理由狀語從句：例如"she was late because she missed the bus."
結果的狀語從句：例如"he was so tired that he fell asleep immediately."
目的狀語從句：例如"i wrote it down so that i wouldn't forget."
條件的狀語從句：例如"if it rains, we'll stay at home."
讓步狀語從句：例如"although it was cold, we went for a walk."
比較狀語從句：例如"she earns more than i do."
每種型別的從句都由乙個特定的介紹詞（例如，that、whether 、if、which、who、when、where、why、how 等）引出，並在句子中發揮不同的語法和語義作用。