How to pronounce three third tones in a row? Edit: This is a duplicate of How does tone sandhi apply in people&#39;s names?

I learned the rules for pronouncing tone pairs, I know that for a sentence like 我买花 the two third tones become a second and a third tone, the pronunciation would be wó mǎi huā. I learned this from This site

I came across this sentence: 我可以看得很清楚. There are three third tones at the start of the sentence 我可以 (wǒ kěyǐ), how do the tones change in a case like this?
I know that for a sentence like 我买花 the two third tones become a second and a fourth tone, the pronunciation would be wó mài huā


According to the rule of the 3rd tone sandhi, to be more precise, the tones should be 2-(半三声)-1. Note that the tone of 买 should be 半三声, which means only the first half of the 3rd tone, without the rising tone part. If you pronounced it as the 4th tone, it'll become 我卖花.

Then for 我可以看~, the tones would be 半三声-2-半三声-4-~. 我可以 could be interpreted as 我+可以, and when three words with the 3rd tone are used together and with 1-2 construction rule #4.2 applies, the 1st word is pronounced as 半三声, the 2nd word is pronounced as the 2nd tone, so 我可 is pronounced as 半三声-2. And according to the rule #3, i.e. when word with the 3rd tone is used before other words with the 1st/2nd/4th tone, it's pronounced as the 半三声, so 以 is pronounced as 半三声 here.