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เนื้อหาย่อ : 1Introduction to scientific statements have in scientific statements fc English the main verbs of sentences are usually in the Smple tense. It is not difficult to see why. Scientific textbooks nfocmation about the present state of scientific knowledge. sunibe experiments showing how this knowledge can be Tbey also show how this knowledge is used in the service of a esult, you will probably use the Present Simple in most of etfic writing Present Tense is so common, it is important to make sure that ects and verbs agtee. 1 Underline the subjects of these sentences and cross out the ch do not agree. (Underline all parts of the subjects, not just Here is an example; hes huoe a greater density than air. ber re a greater density than air. e beis boil at 100 centigrade. on and reaction is/are opposite and equal. eter measures/measure temperature. important subject for an engineer. ighr bulbs in this ro oom produces/produce 100 watts each. bpuid in those bottles is/are dangerous. aults of the experiment proves/prove the law. nbody recognizes/recognize the importance of practical work. eenge, women lives/live longer than men. e wbssances, most of which are metal, is/are good conductors a beds of wood floats/loat on water. ag one kind of wood sinks/sink in water. peng monthly rainfall figures for this area shows/ show a aecise in annual total over the last thirty years. epuent loss of weight of a substance which is immersed in a eguas/equal the weight of the displaced liquid. gndy