Words don't change form
Use context and short markers instead of conjugation and plural endings.
Thai verbs don't change form to agree with a subject or mark tense. ไป stays the same whether the subject is I, one other person or several people. English uses go, goes and went; Thai supplies the relevant meaning through context, time expressions and separate markers.
The same verb ไป
- ผมไปpǒm-bpai
I go
the verb keeps its basic form
- เขาไปkǎo-bpai
They go (one person)
เขา doesn't specify gender; ไป has the same form
- พวกเขาไปpûak-kǎo-bpai
They go (several people)
พวกเขา identifies a group; the verb still stays the same
- เมื่อวานผมไปmʉ̂a-waan-pǒm-bpai
Yesterday I went
yesterday supplies the past time
- พรุ่งนี้ผมจะไปprûng-níi-pǒm-jà-bpai
Tomorrow I will go
tomorrow and จะ indicate the future action
Thai nouns don't need an English-style plural ending. หนังสือ can mean a book or books, depending on context. When the quantity matters, use a number with a classifier or a quantity word such as หลาย, several. Some words can also be repeated with ๆ, but repetition isn't a general plural rule.
two books
เล่ม is the classifier used here for books.
- เด็กๆdèk-dèkchildrenเล่นlêenplay
The children are playing.
ๆ repeats เด็ก, child, giving เด็กๆ, children. The article on marks and spaces explains repetition.
You don't need a conjugation table for each new verb, but you do need to follow the conversation. A Thai sentence may leave tense or number unstated when the context already makes it clear. Don't add a time marker to every sentence just to reproduce an English verb ending.
Practise
Kai says
The same Thai letter can look different in a book and on a sign. Looped and loopless fonts use different shapes, and the app's font setting lets you practise both.