Can you please tell me if these are correct?

跟着我重复 Gēnzhe wǒ chóngfù = repeat after me

你明白 Nǐ míngbái = do you understand?

挺好 Tǐng hǎo = very good
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太好了 Tài hǎole = very good ( ?? what's the difference)  他们就相当于英文中的比较级，挺好的程度没有太好强

这个时候 Zhège shíhòu = this time

你可以试试 ? Nǐ kěyǐ shì shì? = Can you try?

你可以尝试 Nǐ kěyǐ chángshì = Can you try it?

你可以阅读 Nǐ kěyǐ yuèdú = can you read?

你可以阅读 Nǐ kěyǐ yuèdú = can you read it?

语法 Yǔfǎ = grammar

发音 Fāyīn = pronunciation

发言 Fāyán = speaking

我会输入 Wǒ huì shūrù = I will type

你能听到我吗？ = can you hear me?

你能看见我吗？= Nǐ néng kànjiàn wǒ ma? = Can you see me?

清除 =Qīngchú = remove, take out

加 = Jiā =add

你有什么问题吗？ Nǐ yǒu shé me wèntí ma?= do you have any questions?