Deutsche Sprache?

No, you can’t explain the verb. “Love” means in concrete terms that something or someone is not standing, sitting or hanging. In this local context it can be used with different prepositions, e.g.:

Where? local preposition + Dativ

• I’m lying the Bed linen under the Bedclothes.
• The best corner and napkins are already on the Table.

In this context, ” lie: lies/lag/has located” also has to do with “legen: lay/laye/hat laid”, and of course we can explain what happened before, e.g.:

Where to go? local preposition + battery

• I have in Bed linen under the Cover laid.
• I have the best corner and napkins on the table ,

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The solid Verb preposition compound “is applied to + Dativ” but has nothing to do with the concrete “being” and thus also with “being” at all, but means that any result is due to a certain cause or that someone is responsible for this result, e.g.:

• It the lack of cleanliness that I don’t go to this hairdressing salon.
• That less and less parents and their children go to this park, the the many junkies that drive around here.

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Your sentence “I put the delay (…)” is not understandable. Probably you want to say:

• You you are the deceleration of the project completion (or: at the conclusion of the project / at the conclusion of the project).
• I make you the delay in project completion responsible. (or: when completing the project / when completing the project)

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