5 - Lamp The light source in a flashlight. In most flashlights, the lamp is either a tungsten filament (incandescent bulb) or a light emitting diode (solid state bulb), also known as an LED. The tungsten filament or LED glows when electricity flows through it, thus producing visible light.
2. Infinitives are the to form of the verb. The infinitive form of learn is to learn.. You can also use an infinitive as the subject, the complement, or the object of a sentence. Examples: 1  To learn is important. 2  subject of sentence. 3  The most important thing is to learn. complement of sentence.
Infinitives and Conjugations. When you study verbs, you will need to know the difference between the infinitive form of the verb and the finite forms, or conjugated forms. In English, infinitives are verbs preceded by the word to. In Spanish, infinitives end in -ar, -er, or -ir.