很高興為您
only和所修飾的狀語(yǔ)如果不在句首,則不倒裝
只能這樣：Only by combining theory with practice can you make progress.
only位于句首修飾狀語(yǔ)要倒裝
如：only in this way can you learn english well
是only引起的倒裝句,will 是助動(dòng)詞,如果這個(gè)句子正過(guò)來(lái)說(shuō)就是 I will have a chance of achieving my dream only then
在句首的only如果后面跟了副詞、介詞短語(yǔ)或從句等狀語(yǔ),則主句用倒裝結(jié)構(gòu).如only后跟的是主語(yǔ),就不用倒裝結(jié)構(gòu)了.
Only in this way can you learn English well．
Only the teachers are allowed to use the room．（不倒裝）
Only five men were hurt in the accident．（不倒裝）
注意,only和所修飾的狀語(yǔ)如果不在句首,則不倒裝.
如：The boy was helped out only when his father arrived in a hurry．
only then ,是過(guò)一小會(huì)兒的意思,一般用在句首,引導(dǎo)倒裝句.
例句Only then did he realize the importance of English．
解析：在句首的only如果后面跟了副詞、介詞短語(yǔ)或從句等狀語(yǔ),則主句用倒裝結(jié)構(gòu).如only后跟的是主語(yǔ),就不用倒裝結(jié)構(gòu)了.
-------------------------------
★傾心解答★愿您滿意★
★歡迎追問(wèn)★敬請(qǐng)采納★
-------------------------------