1

Web pages can be viewed using many different devices: desktops, tablets, and phones.

I don't understand "viewed using" section. I think it miss a certain word.

  • 1
    You could optionally add the preposition "by": "Web pages can be viewed by using many different devices..." – BillJ Oct 16 '17 at 12:31
2

Web pages can be viewed.

How can they be viewed?

They can be viewed using many different devices.

Many different devices may be used to view web pages.

  • I think it must add the preposition "by" (as @BillJ said above). They can be viewed by using many different devices. – Pham Van Duc Oct 16 '17 at 12:50
  • @PhamVanDuc BillJ also says that the by is optional. – StoneyB on hiatus Oct 16 '17 at 14:10
  • The full passive sentence is They can be viewed by using many different devices. . and the reduced the sentence is : They can be viewed using many different devices. (reduce "by"). Is that right? – Pham Van Duc Oct 16 '17 at 15:07
  • To this US English speaker, the version with "by" sounds weird, and I'm not sure the original sentence is a reduced version of it. It's perfectly normal and fluent as it is. – stangdon Oct 16 '17 at 15:24
  • is there any difference between two sentences? – Pham Van Duc Oct 16 '17 at 15:30

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