In the following sentence which proposition should I use?
> Metals are needed ... the green technology.
- a) for
- b) to
How about this sentence?
> Metals are needed ... power electric cars.
1 Answer
Based on your comments, I believe what you're really asking is what the difference is between "are needed for" and "are needed to".
"...are needed for..." is always followed by a noun phrase because "for" is a preposition.
"... are needed to..." is always followed by an infinitive verb because that's the infinitive "to", not a preposition at all.
to vs forI googled this question's title but I didn't find any useful content so I asked in this forum. I thought it was something about verbneed's preposition. @Astralbee