4.作補足語
（1）不定式作賓語補足語：動詞不定式可用作複合賓語中的賓語補足語，常跟不定式作賓補的動詞有：hold，advi，allow，call，cau，pel，vince，direable，ence，expect，force，forbid，inspire，instruct，order，permit，persuade，press，remind，request，teach，urge，warn等。
如：We hold the truths to be lf-evident that all men are created equal； that they are endowed by their Creator with certain inalienable rights； that among the are life，liberty，and the pursuit of happiness.（US Declaration of Independence）
Allow men and women to register and vote whatever the color of their skin.（Lyndon Johnson）The law，in its majestibsp;equality，forbids the ribsp;as well as the poor to sleep under bridges，to beg in the streets，and to steal bread.（Anatole France）
I call upon you to be with us when we go out Monday.（Martin Luther King Jr.）They（the three words “duty”，“honor” and “try”）
teabsp;you to be proud and unbending in ho failure，but humble and gentle in success； not to substitute words for as，not to ek the path of fort，but to fabsp;the stress and spur of difficulty and challenge.（Douglas MacArthur）
Never advi anyone to go to war or to marry.（Spanish Proverb）
在feel，have，hear，let，make，notice，obrve，e，watch等動詞後麵，複合賓語中動詞不定式的標記to 通常被省略。動詞help後的不定式to可以省去，也可以保留。如：We try to grab piebsp;of our lives as they speed past us.Photographs freeze tho piebsp;and help us remember how we were.（Gene McSweeney）
Don’t let your sorrow e higher than your knees.（Swedish Proverb）
Who woods the are I think I know.His hou is in the village though； He will not e me stopping here to watbsp;his woods fill up with snow.（Robert Frost）
（2）不定式作主語補足語：在主動句中作賓語補足語的不定式在被動句中便是主語補足語。如：The young man was sidered to have great promi.（to have是主語補語）不定式在“主語 動詞 that從句”的被動句中作主語補足語。
如：A discovery is said to be an act meeting a prepared mind.（Albert Szent-Gyyi）（to be是主語補語）
（3）-ing分詞作賓語補足語：Friendship makes prosperity more shining and lesns adversity by dividing and sharing it.（Cicero）
（4）-ed分詞作賓語補足語：能夠利用-ed詞作賓語補足語的動詞有三類，第一類說明感知的狀態，如e，hear，feel，find，think等。第二類是使動詞，如make，get，have，keep等。第三類包括表達希望、命令等的動詞，如like，want，wish，order等。如：Laziness is nothing more than the habit of resting before you get tired.（Jules Renard）