 A really good way to improve your grammar for speaking is to record yourself speaking. So that could be having a conversation with somebody, could be doing IELTS questions, but get 20-30 minutes of you speaking and have it recorded. Listen back sentence by sentence and you're doing a few different things there. Number one, you're raising your awareness about the different mistakes that you're making because many people have errors that they're just making through habit. They don't even notice they're making those. Number two, you're spotting the patterns, you're spotting the common weaknesses that you have. Number three, you can attack those common weaknesses and you can attempt to produce those sentences again using the correct grammar and then you can record yourself again. So you're giving yourself all this feedback and helping yourself in a very efficient, effective way.