With regard to the constructions of it-extraposition, the clausal argument (finite clause or nonfinite clause) acting as subject or object is displaced from its normal, canonical position to the right (non-canonical) position, and the original subject or object position is occupied by an expletive it .

就其結(jié)構(gòu)形式而言，充當(dāng)主語或賓語的分句(限定性時態(tài)分句或非限定性不定式分句)從其常規(guī)位置被外置到一個非常規(guī)位置av人人摸人人爽人人捏人人操，通常置于句末位置日韩中文字幕在线大全视频，而常規(guī)的主語或賓語位置則由一個無實質(zhì)語義內(nèi)容的虛詞 it充當(dāng)。

But the abstracts by native writers and Chinese do have the same tendency in writing style and tense usage. On the basis of the language's deep structure analysis, first in terms of thematic structure, choice of Themes is found to be in common in many ways among abstracts by native and Chinese writers, for instance, simple Themes are most frequently and clausal Themes least frequently used in both.

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