静电设备多少钱:如果把ONLY置于句首，句子必须倒装

If "only" is placed at the beginning of a sentence, this sentence must be partially inverted.
注：ONLY置于句首，句子可能需要部分倒装（partially inverted）,但并不是都是如此，如果only后接主语的话，就不需要倒装，比如：Only you can help me.(只有你才能帮助我。)

only 修饰状语的时候 放在句首必须倒装
但是 当修饰名词的时候，不用倒装
only + 状语”置于句首，其后句子要用倒装(部分倒装)。如：
Only in this way can we learn English. 只有这样才能学会英语。
Only on one point do I agree with you. 只有一点，我同意你的说法。
Only by shouting was he able to make himself heard. 他只有叫喊才能让别人听到他

。。。。。■“only 状语（副词、介词短语、从句等）”放在句首时，句子要用倒装语序。如：
Only in this way can we learn English. 只有这样才能学会英语。
Only then did I understand what she meant. 只有到那时我才明白她的意思。
Only when he is selfless can a man be fearless. 只有无私，才能无畏。
Only if a teacher has given permission is a student allowed to enter this room. 只有得到教师的允许，学生才可以进这间屋。
■若only后接的不是状语，而是主语或宾语，则通常无需倒装。如：
Only those who had booked in advance were allowed in. 只有那些预先订票的人可以进去。
Only part of his story is true. 他说的事只有部分是真的。
Only his sister he saw there. 他在那儿只看到他妹妹。

否定句中only提前才要倒装

准确的描述是：“only + 状语”置于句首，其后句子要用倒装(部分倒装)。如：
Only in this way can we learn English. 只有这样才能学会英语。
Only on one point do I agree with you. 只有一点，我同意你的说法。
Only by shouting was he able to make himself heard. 他只有叫喊才能让别人听到他

only 修饰状语的时候 放在句首必须倒装
但是 当修饰名词的时候，不用倒装