104 The Loom of Language Such roundabout expressions are of two kinds. We may simply, as in the last examples, insert some qualifying expression or particle which denotes time (e g formerly, now, soon), or aspect (e g once, habitually) Alternatively we may use the construction known as a compound tense by combining a helper with the dictionary form of the verb (e.g / shall sing) or with one of two derivatives called the present and past participles The present participle of English verbs is the -ing derivative, as in / am singing. The part participle is the corresponding form in / have sung. We can use both to qualify a noun^ e g a singing bird or an oft-sung song All English verbs (except some helpers) have an -mg derivative Verbs which take the -ed or ~t suffix have one form winch we can use to qualify a noun (e g a loved one)> as the simple past tense form (e g* she loved him) or with helpers (e g she had loved him or she is loved) In Anglo-American usage the Chinese trick of relying on particles often overrides the distinction otherwise inherent in the use of the helper verbj as in, (a) / am leaving to-morrow > (b) I am constantly leaving my hat behind There is therefore nothing surprising about the fact that so few of us notice it when we have no tense flexion to lean on* A student of social statistics finds himself (or herself) at no disadvantage because the verb in the following sentences lacks present and past distinction' Oars cost x dollars a bushel to-day Oats cost y dollars a bushel last fall Indeed, few people who speak the Anglo-American language realize how often they use such verbs every day of their lives. Below is a list of common verbs which have only three forms: the dictionary verb* its ~mg derivative and the -5 derivative of the third person singular present* bet cost hurt quit shed split burst cut let nd shut spread cast lut put set slit thrust The foreigner who wishes to learn the language of Francis Bacon and Benjamin Franklin has nothing more to learn about them, and the time of young children is not wasted with efforts to memorize such anomalies as: give gave given sing sang sung live lived lived bring brought brought Fortunately most English verbs are weak. That is to say, they have a Single past derivative with the suffix ~ed (or -*) added to the dictionary