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Context: Looking for a new job while working at the company, and attending many interviews though, unable to get it.

I am fed up with looking for a new job for a very long time.

Please check them.

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kumenglishLooking for a new job while working at the in a company, and I've attended many interviews but though, unable to get one it.
kumenglishI am fed up with looking for a new job for a very long time.

Fine.

Or:

I'm fed up with having to look for a new job for so long.

Comments  
Students: We have free audio pronunciation exercises.
kumenglishI am fed up ... for a very long time.

We don't use the present tense with "for (a period of time)". We use the present perfect to show that the time period started before the present and continues to the present.

I have been fed up ... for a very long time.


Treasury bonds have been rising for a month. (Not 'are rising for a month'.)
The stage crew of students has been working hard for nine weeks. (Not 'are working for nine weeks'.)
Jan Greenberg has collaborated with Sandra Jordan for 20 years. (Not 'collaborates ... for 20 years'.)

CJ

Does it sound natural to say: "I've made many interviews etc."?

Moonrise

Does it sound natural to say: "I've made many interviews etc."?

No.

I've had a lot of interviews.

CJ

Students: Are you brave enough to let our tutors analyse your pronunciation?