Quick Answer The present perfect tense uses have or has + the past participle of a verb (like eaten, seen, done). Use it when something in the past still matters now. Example: “I have eaten lunch” means you are not hungry now. Have or Has + Past Participle — See the Pattern The present perfect…
Quick Answer The plural of vertebra is vertebrae. You can also say vertebras — both are correct. Example: “The human spine has 33 vertebrae.” Vertebra and Vertebrae — See the Pattern A vertebra is one small bone in your back. Your spine is made of many of these bones stacked together. Look at how the…
Quick Answer The plural of thesis is theses. The word “thesises” is not correct in English. One: She wrote a long thesis for her degree. More than one: The students handed in their theses last week. Thesis Becomes Theses — See the Pattern Look at these words. Can you see what happens? Did you see…
Quick Answer The plural of tableau is tableaux or tableaus. Both are correct. The word comes from French, so it has two ways to make the plural. One: The museum has one beautiful tableau.More than one: The museum has several beautiful tableaux. Tableau, Tableaux, Tableaus — See the Pattern Look at these sentences. Can you…
Quick Answer The plural of symposium is symposia or symposiums. Both are correct. Symposiums is more common in everyday English. Symposia is used more in academic and formal writing. One: The symposium starts at nine o’clock.Many: The university held three symposiums this year. Symposium, Symposia, Symposiums — See the Pattern Look at these words. Can…
Quick Answer The plural of syllabus is syllabi or syllabuses. Both are correct. Syllabi is more common in schools and universities. Syllabus, Syllabi, Syllabuses — See the Pattern The word syllabus comes from Latin. That is why it has two plural forms. Look at these examples: Did you see the pattern? When there is one,…
Quick Answer The plural of stimulus is stimuli. It follows the Latin rule — words ending in -us change to -i for the plural. One: The bright light was a strong stimulus.Many: The scientists tested different stimuli. Stimulus, Stimuli — See the Pattern Look at these words. Can you see what happens? Did you see…
Quick Answer Software has no plural form. It is always software — never “softwares.” Example: “We installed new software on all the computers.” “Software” Never Changes — See Why Look at these sentences. What do you notice about the word software? Did you see? The word software stays exactly the same every time — whether…
Quick Answer The plural of species is species. The word never changes. One species, many species — always the same. One: This species is very rare. Many: These species are all endangered. One Species, Two Species — The Word Never Changes Look at these sentences. Can you see what happens? Did you see the pattern?…
Quick Answer The plural of radius is radii. You can also say radiuses — both are correct. Radii is more common. One: The radius of this circle is 5 cm.Many: The radii of these circles are all different. Radius, Radii, Radiuses — See the Pattern Look at these words. Can you see what happens? Did…
