In English we have many different ways of emphasing a particular point. Words like 'very' and 'extremely' are the most known by students.
Others ways to do this are with 'so' and 'such'.
If you say: "it's so hot today!", it's a stronger emphasis than saying "it's very hot today."
The structure is: SO + ADJECTIVE
Another alternative is by saying "It's such a hot day!" This is also stronger than 'very'
The structure is: SUCH + ADJECTIVE + NOUN
When we are unhappy about something we can complain about it. Complain is the verb and complaint is the noun. The collocation is 'make a complaint' or 'have a complaint'.
