當only+狀語位於句首時，其後習慣上要用部分倒裝。其中，only後的狀語可以是副詞、介詞短語、從句等。
Only in this way can we learn English.
只有這樣才能學會英語。
Only then did I understand what she meant.
只有到那時我才明白她的意思。
Only by shouting was he able to make himself heard.
他只有叫喊才能讓別人聽到他。
注意，在only後作狀語的是從句時，從句不要用倒裝，要部分倒裝的.是主句。如：
Only when it rains do you feel cool.
只有下雨時才覺得涼爽一點。
Only when he returned home did he realize what had happened.
當他回到家裡時，才知道出了什麼事。
Only when we landed did we see how badly the plane had been damaged.
我們只是在著陸之後才看到飛機損壞的嚴重程度。
