Verbal | how to improve verbal

sir/ma'am
I am writing GMAT at the end of this month however my mock scores are stuck around 680 to 690 (veritas prep :680,690,MGMAT:690,experts Global :680,680,650)
my verbal is at v35 to v38 and quant is hovering aroung Q46 to Q47 which i know can pull up to Q49 .
but i am scared about the verbal in my last attempt i had reached v33 in mocks but reduced v30 in actual exam

sources used :Egmat ,Veritas prep books,MGMAT ,Magoosh ,education Aisle Sentence correction Nirvana and optimus prep
random
...

---