1. -”GO” verbs
There are some verbs that are irregular in the YO form, with a stem change adding a “g” to the stem [like TENER – yo tengo]
These verbs have the same type of stem change:
HACER – to make / to do
PONER – to put / to place
SALIR – to leave
TRAER – to bring

2. These verbs have a stem change only in the YO form:
HACER PONER
hago hacemos pongo ponemos
haces hacéis pones poneis
hace hacen pone ponen
SALIR TRAER
salgo salimos **traigo traemos
sales salís traes traéis
sale salen trae traen
**Note that the YO form of TRAER adds an ‘i’ along with the ‘g’ to the stem!

3. HACER and PONER are used in idiomatic expressions [does not translate directly from one language to another] :
hacer un viaje to make [to take] a trip
hacer la maleta to pack the suitcase
poner la mesa to set the table

4. There is one other common verb similar to these
There is one other common verb similar to these. The verb VENIR is conjugated like TENER with a ‘g’ added to the YO form and an e>ie stem change in the “shoe”
VENIR – to come
vengo venimos
vienes venís
viene vienen