use to” grammar”Don’t feel bad if you mix up use to and used to now and again—it is not an uncommon mistake. Used to is a phrase that can mean “accustomed or habituated to” or refers to something from the past that is no longer true. Use to and used to are also frequently used in English grammar as modal verb phrases.
”Use” Followed by an Infinitive
Before we get into idiomatic meanings for the phrase used to, it is worth pointing out that both use and used can correctly appear before to when to is part of the infinitive of a second verb. That sounds far more complicated than it is, so let’s go straight to some examples.
What do you use to decorate cakes and cookies?
Buttercream icing was used to frost all of today’s cakes and cookies.
In these kinds of sentences, whether you decide to write use to or used to will depend on whether the present or past tense is needed.
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conditional grammarWe can make a zero conditional sentence with two present simple verbs (one in the ‘if clause’ and one in the ‘main clause’)
If + present simple, …. present simple
This conditional is used when the result will always happen. So, if water reaches 100 degrees, it always boils. It’s a fact. I’m talking in general, not about one particular situation. The result of the ‘if clause’ is always the main clause.
The ‘if’ in this conditional can usually be replaced by ‘when’ without changing the meaning.
For example: If water reaches 100 degrees, it boils. (It is always true, there can’t be a different result sometimes). If I eat peanuts, I am sick. (This is true only for me, maybe, not for everyone, but it’s still true that I’m sick every time I eat peanuts)
Here are some more examples: