has led or had led?
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The past tense of the verb lead is led, not lead. One reason for the confusion might be that a similar verb, read, has an infinitive that's spelled the same as the past tense. But with lead, that's not how things are. Led is the correct way to spell the past tense of lead.
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The two leads on a diode are known as the Anode and Cathode. The Anode of the LED is the positive lead, and the cathode is the negative lead. On standard through-hole LEDs, the body will have a flattened edge on one side, the lead on this side is the cathode and is usually also the shorter lead.
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As LEDs are diodes instead of incandescent bulbs, they are less likely to break, which means they're more likely to withstand a variety of cold and damp British weather. LED lighting is the energy efficient choice this Christmas.
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The LEDs on multi-LED base stations are on the bottom of the front face. The middle LED is the Internet connectivity LED. If the Internet LED is solid green ( ), the base station is connected to the Internet. If the Internet LED is amber ( ), there is a problem with the Internet connection.
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Light emitting from LED on the walls is more brighter than CFL! It is brighter because LED delivers same or better brightness at less electricity consumption and when used equivalent to the watts of CFL,definitely it is brighter and efficient!
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The LEDs on multi-LED base stations are on the bottom of the front face. ... If the Internet LED is solid green ( ), the base station is connected to the Internet. If the Internet LED is amber ( ), there is a problem with the Internet connection.
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Both are correct and depend on context. “Have given” is the present perfect tense and is formed by using has/have with the past participle of the verb. The present perfect tense describes an action that happened at an indefinite time in the past OR that began in the past and continues in the present.
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One big difference between LED bulbs and incandescent bulbs is that LED bulbs don't just burn up and stop working once they reach the end of their lifespan. Instead, they slowly degrade, their maximum brightness getting lower and lower over time.
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'Has' is the third person singular present tense of 'have' while 'had' is the third person singular past tense and past participle of 'have. ' ... Both are transitive verbs, but 'has' is used in sentences that talk about the present while 'had' is used in sentences that talk about the past.
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Yes, every light produces heat. It does not matter if the light comes from a bulb, diode, or a star like our sun; they all produce heat. LEDs provide a more efficient means for converting energy to light than other methods and therefore produce less heat, but they can not break the laws of physics.
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The verb shine has two past-tense forms: shined and shone. Shined and shone are competing acceptable past tense forms of the verb shine. Some (but not all) sources recommend using shined when the verb has an object and shone when it does not: Grammar Girl shined her headlights at the abandoned house.
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1. 'Has' is the third person singular present tense of 'have' while 'had' is the third person singular past tense and past participle of 'have. ... Both are transitive verbs, but 'has' is used in sentences that talk about the present while 'had' is used in sentences that talk about the past.
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LED, which stands for “light emitting diodes,” differs from general LCD TVs in that LCDs use fluorescent lights while LEDs use those light emitting diodes. Also, the placement of the lights on an LED TV can differ. The fluorescent lights in an LCD TV are always behind the screen.
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Since the technology is better, all LCD TVs now use LED lights and are colloquially considered LED TVs. For those interested, we'll go deeper into backlighting below, or you can move onto the Local Dimming section.
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LED stands for Light Emitting Diode. LEDs began as exciting but expensive electronic components in the sixties, used in handheld calculators and other similar devices.
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The main difference between an LED TV and an OLED TV is that the pixels of an OLED TV are self illuminating, whereas the LEDs in an LED TV are used to light an LCD display. ... OLED TVs feature a wider viewing angle than do LED TVs. With OLED, the colors do not get washed out when viewers watch from extreme angles.
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According to dictionary dot com, both “shown” and “showed” are acceptable forms of the pat participle of “to show.” However, “shown” is preferred. So, either “I have shown” or “I have showed” is acceptable, but “I have shown” is preferred.