英語句子中的倒裝分為部分倒裝和全部倒裝（Full Inversion）。所謂部分倒裝是指將句子謂語部分的助動(dòng)詞或情態(tài)助動(dòng)詞置于主語之前，全部倒裝是指將整個(gè)謂語動(dòng)詞置于主語之前。倒裝語序常出現(xiàn)在下列情況中：
    1． 為避免句子部分內(nèi)容重復(fù)，英語中常用倒裝句，即：so (neither, nor)＋be動(dòng)詞（助動(dòng)詞，情態(tài)動(dòng)詞）＋主語。例如：
    My father is an engineer; so is my husband.
    Jane didn’t attend my class yesterday; nor did Morris.
    注意：如表示贊同別人的陳述，so后面的部分不倒裝。例如：
    “Jim is a good-swimmer.”
    “So he is, and so is Dick.”
    2． 具有否定意義的詞或短語置于句首時(shí)，句子一般部分倒裝，即將be動(dòng)詞、助動(dòng)詞或情態(tài)動(dòng)詞提到主語前。這類詞或短語包括：not, never, seldom, hardly, rarely, scarcely, by no means, under no circumstances, in no way, at no time, no sooner…(than), hardly…(when), not only…(but also)等。例如：
    Never has my brother been abroad before.
    Hardly had I sat down when I heard someone knocking at the door.
    No sooner had he returned than he bought a fine house and went to live there.