Why aren't modal verbs on the word List?

Modal verbs such as:  "to be", "to have", "can" "must" "want to", "could", "would" are not on the word list because, the 625 List is designed to provide two things:

1)  Extremely frequent, useful words [Modal verbs definitely fall into this category]

2)  Words that can be easily learned using pictures alone

The goal for these 625 Lists is to give users a way to learn a bunch of key vocabulary without needing to resort to translation. Once you progress to sentences and grammar, you should already have a solid vocabulary foundation, and can better focus on grammar and abstract vocabulary.

For more info on how to learn abstract words and phrases, have a look at these articles:

https://help.fluent-forever.com/hc/en-us/articles/360004411152-What-should-we-do-with-abstract-words-like-feelings-or-academic-vocabulary-

https://help.fluent-forever.com/hc/en-us/articles/360004464171-What-is-the-best-way-to-implement-the-method-to-learn-abstract-phrases-

https://help.fluent-forever.com/hc/en-us/articles/360004410892-When-do-I-learn-the-hard-to-associate-words-

Note: As of September 12th 2019, we no longer provide official support for our Anki based pronunciation trainers and word lists. You are more than welcome to still purchase and use them, but the support we are able to offer for these products is limited. For supported languages, these materials are already built into the Fluent Forever app.