30:17
STRUCTURE
2433 Views
01:56
READING COMPREHENSION &VOCABULARY
1355 Views
01:52
The Form of Irregular Verbs
1370 Views
01:59
The Tense of the Passive Voice
1442 Views
09:31
Changing from Active into Passive
1220 Views
07:20
The Form of the Passive Voice
1424 Views
03:29
What is the Passive Voice?
1469 Views
03:45
The Form of the Active Voice
1423 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1881 Views
03:20
Since vs For
1570 Views
04:50
Have or Has
1382 Views
00:49
Key Words: Present Perfect
3266 Views
09:03
The Use of the Present Perfect
1389 Views
03:08
Meaning and Form
1434 Views
02:40
Writing Formal Letters
1422 Views
03:10
Language Use
2009 Views
09:35
Parallel Structure
1579 Views
04:35
Prepositions of Instruments and Means
1392 Views
03:27
Polite Requests
1488 Views
06:30
May as a Modal of Permission and Request
1473 Views
04:11
Can as a Modal of Permission and Request
1283 Views
02:50
عناصر الاداء
1389 Views
03:45
شركة ستيرن
956 Views
01:15
مقياس القيمة المضافة
1255 Views
02:58
مقياس الربحية
1155 Views
02:39
معايير دركر
1315 Views
03:51
مقايس الاداء
1322 Views
01:41
اتخاذ اجراءات تصحيحية
1018 Views
01:52
المرحلة الثانية من الرقابة
1012 Views
02:49
مراحل الرقابة
2368 Views