READ OUT LOUD. Choose which marked text you prefer to practice with - macrons or accent marks - and read the text out loud until you feel comfortable and confident. Then, try reading the unmarked text at the bottom. It should be easy for you after practicing with the marked texts. :-)
MACRONS. Here is the text with macrons:
Viatōrēs aestātis tempore nimiō merīdiānī sōlis calōre labōrantēs, cum Platanum vīdissent, sub eam confūgērunt, eiusque strātī sub umbrā recubuērunt. Ad eam deinde conversīs oculīs, Quam est inūtilis, inter sē aiēbant, haec arbor hominibus, et infructuōsa! Illa vērō rēspondēns, Ō vōs, inquit, ingrātōs, quī meō adhuc beneficiō fruentēs, inūtilem mē infructuōsamque vocātis.
ACCENT MARKS. Here is the text with accent marks, plus some color-coding for the words of three or more syllables (blue: penultimate stress; red: antepenultimate stress):
Viatóres aestátis témpore nímio meridiáni solis calóre laborántes, cum Plátanum vidíssent, sub eam confugérunt, eiúsque strati sub umbra recubuérunt. Ad eam deínde convérsis óculis, Quam est inútilis, inter se aiébant, haec arbor homínibus, et infructuósa! Illa vero respóndens, O vos, inquit, ingrátos, qui meo adhuc benefício fruéntes, inútilem me infructuosámque vocátis.
UNMARKED TEXT. Here is the unmarked text - after practicing with the marked text that you prefer, you should not have any trouble with the unmarked text:
Viatores
aestatis tempore
nimio meridiani solis calore
laborantes,
cum Platanum vidissent,
sub eam confugerunt,
eiusque strati sub umbra
recubuerunt.
Ad eam
deinde conversis oculis,
Quam est inutilis,
inter se aiebant,
haec arbor
hominibus,
et infructuosa!
Illa vero respondens,
O vos, inquit, ingratos,
qui
meo adhuc beneficio fruentes,
inutilem me
infructuosamque
vocatis.
IMAGE. Here is an illustration for the story (image source) showing a lovely plane tree:
