1. The building of the new bridge will go ahead as planned.
2. The building of the new bridge will go ahead as is planned.
3. The building of the new bridge will go ahead as it was planned.
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What does #1 mean, #2 or #3?
All mean approximately the same thing, but as always, the more concise you are, the better. Sentence 1 is the best. The others become wordy!
To understand the meaning of each sentence, let's examine them one by one:
1. "The building of the new bridge will go ahead as planned."
In this sentence, the phrase "as planned" refers to the original or intended plan for building the new bridge. It suggests that there is a pre-existing plan in place for constructing the bridge, and the construction will proceed according to that plan without any changes or delays.
2. "The building of the new bridge will go ahead as is planned."
Sentence 2 seems grammatically incorrect. The phrase "as is planned" is not commonly used and may be considered incorrect or awkward. It is better to use "as planned" in this context to convey the intended meaning.
3. "The building of the new bridge will go ahead as it was planned."
In sentence 3, the phrase "as it was planned" implies that there was a previous plan that may have been altered or updated. The construction of the new bridge will proceed according to the plan that was established in the past, potentially indicating that changes were made along the way.
So, out of the three sentences, the most appropriate and commonly used construction is sentence 1, which conveys that the building of the new bridge will proceed according to the original plan.