1) Language UNDERPINS our social relationships
Language supports our social relationships.
Language is the foundation to our social relationships
2) My baby didn’t sleep when he was MEANT TO, which meant I couldn’t either.
Dyocs got this one.
My baby didn’t sleep when he was supposed to, ...
3) Speak in “BABY-ESE” with big, loud, slow vowel sounds.
Speak in baby language...
Speak in baby talk...
the -ese suffix comes from the ending of Japanese and Chinese as foreign languages and implies the same to baby talk.
4) I would often LOOK IN AWE as other...
I would often look with great suprise as other...
Though awe really means respect mixed with wonder.
5) SCALING UP, they proposed that by the time the children were four years old...
This one's a little hard to give another option without context. Scaling up in general means to adjust to account for a larger number. Scaling up the recipe to serve 8 instead of 4 means I need 6 cups of flour instead of 3.
6) Other critics have since shown that low-income children hear many more words than they reported WHEN FACTORING IN LANGUAGE THEY OVERHEAR from conversations both inside and outside the home
...when considering language they overhear...
...when taking into account language they overhear...
...when accounting for language they overhear...
7) Children who had more TURN-TAKING CONVERSATIONS were better at language comprehension tasks.
Children who had more conversations where they took turns talking were...
that's a standard construction of using two nouns (the second being a gerund in this case), hyphenating them, and turning them into an adjective.
8) There are other ways to help speed this process ALONG, too
There are other ways to help make this process go faster, too.
9) Though the games are GEARED towards children
Though the games are designed for children.
I thank you sincerely your time
-You're very welcome. Are alternatives enough or do you need explanation of more of them too?