If anything, (sentence).

Use this phrase to say that an idea is very incorrect.

For example, imagine that a friend says that you're not as good of a tennis player as you used to be. You disagree. The conversation goes like this:

A: We're all getting older, right? We can't play like we used to.

B: Oh, no. If anything, I'm actually better now than I was in college.

Person A thinks that you're a worse tennis player. You think that you're the same skill, or maybe even better than before.

Here's another example. Person A promised to go to Person B's art show, but now has to cancel:

A: I feel so bad for saying that I would go and then not following through.

B: No reason to feel bad. If anything, I'm the one who should feel bad for pressuring you into coming.

A: No, not at all! I really wanted to go.

(someone) has to actively work to (do something)

Some things happen naturally. For example, a naturally smart person might read a book and remember a lot of the details that they read, without having to try hard.

Other things don't happen naturally. You have to "actively work" to make them happen. If you don't have a good memory, you may have to "actively work" to remember things that you read.

Here's another example:

I'm not naturally a good public speaker. I've had to actively work to become good at it.

(someone) put on weight

When a person gets heavier, you can say that they're "putting on weight".

Has he put on weight?

Another phrase that you can use is "gain weight":

Has he gained weight?

A person can also "put on muscle", which means to grow bigger muscles.

(do something) to (do something)

You can use the word "to" to give the reason for doing something:

I said that to make him angry.

You can expand "to" to "in order to":

I said that in order to make him angry.