語法填空“三板斧”
以下方法適合人羣：詞彙量小、閲讀少，語法規則不清晰。
我們把上圖分別簡稱為：圖1（三公式）；圖2（名詞詞塊）；圖3（動詞形式）；圖4（從句連詞）。對照流程圖，我們逐題分析——
題1：One of the earliest-known inventions is the bow and arrow, which is still used throughout the world today, 15,000 yearsit was first invented.
根據圖1簡化句子後——
SV：One of the earliest-known inventions is
LSV：which is still used
LSV：it was first invented.此處應填入連詞
根據圖4，排除其它可能，為副詞性從句，表示時間“發明一萬五千年以後”，故填入after。
（注：表示“後”的連詞還有since，但需要主句用完成時，此處不符合）
題2：In western Asia, another extremely important invention was born—the ability_____(produce) pots.
根據圖1簡化句子後——
SV：invention was born
破折號後是一個詞組，定義該發明為the ability，什麼能力呢？根據圖2詞塊公式，ability加不定式定語。故填入toproduce：製作陶罐的能力
題3：_____ say that the wheel is the single most important invention.
根據圖1簡化句子後——
SVLSV：_____ say that the wheel is
句子缺主語，填入不定代詞some（有些人）説。
題4：Around 1500 years later, the Phoenicians used sand, limestone and sodium carbonate to produce something else which we (24)_____(lose) without—glass.
根據圖1簡化句子後——
SVLSV：Phoenicians used …which we_____(lose)without
可判定此處動詞lose為謂語形式。應做時態語態判斷。
根據圖3，首先根據前後句，可確定“時”為過去。
這裏有個要命的without——withoutwhich：如沒有something即glass，則我們會……，可判斷“態”為未發生，因此為過去將來時wouldlose。
但是別急！！wewouldlose我們會失去什麼呢？顯然不妥。所以還需考慮語態：belost（不知所措）
最終答案為：wouldbelost。
題5：Another amazing invention is_____we probably take for granted these days: the skill of knitting, which first appeared in the Roman Empire. Some 1700 years ago.
根據圖1簡化句子後——
SVLSV：invention is_____we probably take缺少連詞，進入圖4.
根據這個is判斷為名詞從句，且take…for granted缺少賓語成分。故而判斷為連詞what。
題6：Time flies and we spend a lot of time_____(check) how much time we have left!
根據圖1簡化句子後——
此處check為非謂語動詞，進入圖3，根據搭配spend…doing,填入checking。
題7：The first pocket watch was invented by Thomas Tompion (1639-1714) in England 330 years ago, and his watch-face design, with two (and sometimes three) hands moving around a single dial, (30)_____(remain) largely unchanged in all that time.
根據圖1簡化句子後——
SVLSV：The first pocket watch was invented, and his watch-face design,_____(remain) largely unchanged。可判斷此處remain為謂語形式。進入圖3。
先看“時”：最早的懷錶被髮明（過去）……表面設計保持始終沒變（指現在）。
這裏有個判斷完成時的敲門：一個事情發生的時間，似乎在過去和現在之間糾結不清，那麼大概率它就是現在完成時了。所以此處為hasremained。